以下是与历史执行记录完全不重复的英语四、六、八级必背单词各5个，包含音标、释义、同近反义词、易误用词及10个例句与出处：

CET-4（英语四级）

1. accelerate /əkˈseləreɪt/

• 释义：v. （使）加速；促进
• 同义词：speed up, hasten, boost
• 近义词：quicken, advance
• 反义词：decelerate, slow down, delay
• 易误用词：accelerate vs. aggregate（前者为加速，后者为总计/聚合，拼写相近易混）
• 例句及出处：
  1. The government plans to accelerate economic growth by investing in infrastructure.（出自：新东方英语四级考试网《2025年6月英语四级高频词汇及例句》）
  2. Technological innovation continues to accelerate the pace of modern life.
  3. We need to accelerate the training process to meet the deadline.
  4. The car can accelerate from 0 to 60 mph in just five seconds.
  5. Global warming is accelerating due to excessive carbon emissions.
  6. The manager decided to accelerate the product launch by two weeks.
  7. Exposure to new ideas can accelerate children’s cognitive development.
  8. The software update will accelerate data processing speeds significantly.
  9. Efforts to accelerate vaccine distribution have yielded positive results.
  10. Don’t accelerate too quickly on icy roads to avoid skidding.

2. voluntary /ˈvɒləntri/

• 释义：adj. 自愿的；志愿的；无偿的
• 同义词：willing, unpaid, intentional
• 近义词：spontaneous, discretionary
• 反义词：compulsory, forced, involuntary
• 易误用词：voluntary vs. volunteer（前者为形容词“自愿的”，后者多为名词“志愿者”或动词“自愿做”）
• 例句及出处：
  1. She made a voluntary contribution to the charity.（出自：英语四六级官网《四六级真题生词本》）
  2. Participation in the survey is completely voluntary.
  3. He took voluntary redundancy to pursue a different career path.
  4. Many voluntary organizations rely on donations to operate.
  5. The school runs a voluntary tutoring program for struggling students.
  6. Voluntary work can greatly enrich your personal experience.
  7. No one was forced to sign; it was a voluntary agreement.
  8. The company encourages voluntary blood donation among employees.
  9. A voluntary confession may sometimes lead to leniency in court.
  10. This is a voluntary code of conduct, not a legally binding rule.

3. vulnerable /ˈvʌlnərəbl/

• 释义：adj. 易受伤害的；脆弱的；易受攻击的
• 同义词：susceptible, defenseless, exposed
• 近义词：weak, unprotected
• 反义词：resilient, protected, secure
• 易误用词：vulnerable vs. invulnerable（后者意为“刀枪不入的、不会受伤害的”，前缀in-表否定）
• 例句及出处：
  1. Young people are more vulnerable to the influence of social media.（出自：英语四六级官网《四六级真题生词本》）
  2. The report highlights how climate change leaves coastal cities vulnerable.
  3. Elderly people are particularly vulnerable during heatwaves.
  4. A vulnerable child needs extra care and emotional support.
  5. The system has a vulnerable backdoor that hackers could exploit.
  6. Refugees are among the most vulnerable populations in conflict zones.
  7. Feeling emotionally vulnerable, she hesitated before speaking up.
  8. Small businesses were vulnerable during the economic downturn.
  9. Without insurance, you remain financially vulnerable in crises.
  10. The species is listed as vulnerable on the conservation status index.

4. assignment /əˈsaɪnmənt/

• 释义：n. 任务；作业；分配
• 同义词：task, duty, job
• 近义词：project, mission
• 反义词：leisure, recreation（从“工作任务”对立面理解）
• 易误用词：assignment vs. assess（前者为“任务/分配”，后者为“评估”，发音相近易听错）
• 例句及出处：
  1. There was no telling what the next assignment would be.（出自：英语四六级官网《四六级真题生词本》）
  2. The teacher gave us a writing assignment due next Monday.
  3. Completing this assignment on time is crucial for your grade.
  4. He was sent abroad on a diplomatic assignment.
  5. The software automatically handles user assignment in the workflow.
  6. She finished her assignment ahead of schedule and submitted it early.
  7. Each student received a different assignment based on their level.
  8. The journalist’s assignment was to cover the election in rural areas.
  9. Clear assignment of responsibilities prevents team conflicts.
  10. This assignment requires you to analyze at least three case studies.

5. proportion /prəˈpɔːʃn/

• 释义：n. 比例；部分；面积；均衡
• 同义词：ratio, percentage, share
• 近义词：fraction, dimension
• 反义词：whole, total（整体与部分的对立）
• 易误用词：proportion vs. proposal（拼写结构相似，前者为“比例”，后者为“提议/方案”）
• 例句及出处：
  1. His head is out of proportion to the size of his body.（出自：英语四六级官网《四六级真题生词本》）
  2. A large proportion of the budget goes to research and development.
  3. The chart shows the proportion of renewable energy used by each country.
  4. Keep your introduction in proportion to the rest of the essay.
  5. Women make up a growing proportion of the engineering workforce.
  6. The punishment should be in proportion to the seriousness of the crime.
  7. Only a small proportion of applicants were invited for interviews.
  8. The artist carefully adjusted the proportion of the sculpture.
  9. Mix the ingredients in proportion to maintain the right flavor.
  10. Rising house prices are out of proportion to average incomes.

CET-6（英语六级）

1. fragile /ˈfrædʒaɪl/

• 释义：adj. 易碎的；脆弱的；纤弱的
• 同义词：breakable, delicate, weak
• 近义词：flimsy, brittle
• 反义词：sturdy, robust, durable
• 易误用词：fragile vs. agile（前者“易碎的”，后者“敏捷的”，拼写尾端相似）
• 例句及出处：
  1. Handle the glassware with care—it’s extremely fragile.（出自：英语四六级官网《英语四六级核心词汇 day26》）
  2. The fragile ecosystem of the coral reef is under threat.
  3. She was still in a fragile emotional state after the loss.
  4. Peace talks are fragile and could collapse at any moment.
  5. These ancient manuscripts are too fragile to be handled often.
  6. The patient’s fragile health required constant monitoring.
  7. Don’t ship fragile items without proper cushioning material.
  8. Trust is fragile and takes time to rebuild once broken.
  9. The newborn’s fragile bones need gentle handling.
  10. Global supply chains proved surprisingly fragile during the pandemic.

2. intense /ɪnˈtens/

• 释义：adj. 强烈的；剧烈的；紧张的；热切的
• 同义词：strong, severe, extreme
• 近义词：fervent, profound
• 反义词：mild, weak, moderate
• 易误用词：intense vs. intensive（前者强调程度高“强烈的”，后者强调集中投入“密集的/精深的”，如intensive course）
• 例句及出处：
  1. She felt intense pain after injuring her ankle.（出自：英语四六级官网《英语四六级核心词汇 day26》）
  2. The competition for top universities is becoming increasingly intense.
  3. He has an intense gaze that makes people feel scrutinized.
  4. The region experienced intense rainfall over the weekend.
  5. After weeks of intense negotiation, a deal was finally reached.
  6. The movie builds up to an intense climax in the final act.
  7. She is an intense reader who can finish a novel in one sitting.
  8. Working under intense pressure can lead to burnout.
  9. The sun’s intense heat made outdoor work unbearable.
  10. His intense devotion to music started at a very young age.

3. gloomy /ˈɡluːmi/

• 释义：adj. 昏暗的；忧郁的；令人沮丧的
• 同义词：dim, depressing, melancholy
• 近义词：dismal, bleak
• 反义词：bright, cheerful, optimistic
• 易误用词：gloomy vs. groom（前者“昏暗/忧郁的”，后者“新郎/打扮”，仅首字母差异易拼错）
• 例句及出处：
  1. The gloomy room had no windows and felt depressing.（出自：英语四六级官网《英语四六级核心词汇 day26》）
  2. The weather forecast predicts a gloomy and rainy afternoon.
  3. He was in a gloomy mood after failing the entrance exam.
  4. The report painted a gloomy picture of the economy.
  5. They wandered through the gloomy corridors of the old castle.
  6. Don’t be too gloomy—things will get better eventually.
  7. The gloomy atmosphere of the film suited its tragic theme.
  8. Investors remain gloomy about the short-term market outlook.
  9. Under the gloomy sky, the whole town seemed unusually quiet.
  10. Her gloomy expression hinted that something had gone wrong.

4. evolve /iˈvɒlv/

• 释义：v. 进化；逐步发展；演变
• 同义词：develop, progress, unfold
• 近义词：mature, grow
• 反义词：regress, stagnate
• 易误用词：evolve vs. revolve（前者“进化/演变”，后者“旋转/绕转”，拼写与词义均易混）
• 例句及出处：
  1. Technology has evolved rapidly over the past decade.（出自：英语四六级官网《英语四六级核心词汇 day17》）
  2. The company’s management style has evolved to be more inclusive.
  3. Humans evolved from earlier hominid species over millions of years.
  4. Public attitudes towards remote work are continuing to evolve.
  5. The plot of the novel evolves in unexpected ways.
  6. Language evolves naturally as societies change.
  7. Their friendship evolved into a lifelong partnership.
  8. New features will evolve based on user feedback.
  9. The design evolved through several rounds of prototyping.
  10. Over time, simple tools evolved into complex machines.

5. overwhelming /ˌəʊvəˈwelmɪŋ/

• 释义：adj. 压倒性的；难以抗拒的；极大的
• 同义词：crushing, immense, staggering
• 近义词：dominant, irresistible
• 反义词：trivial, negligible, manageable
• 易误用词：overwhelming vs. overthrowing（前者“压倒性的”，后者“推翻/颠覆”，前缀over-易联想混淆）
• 例句及出处：
  1. The city faces an overwhelming housing crisis.（出自：CATTI & MTI 备考词汇学习 Day22）
  2. She felt an overwhelming sense of relief when the results came out.
  3. The evidence against him was overwhelming.
  4. An overwhelming majority of voters supported the new policy.
  5. The amount of information online can be overwhelming for beginners.
  6. He was greeted with overwhelming applause at the conference.
  7. The team faced overwhelming odds but refused to give up.
  8. There is overwhelming consensus among scientists on this issue.
  9. The beauty of the landscape was overwhelming and unforgettable.
  10. Don’t let overwhelming emotions cloud your judgment.

TEM-8（英语专八）

1. grapple /ˈɡræpəl/

• 释义：v. 努力解决（问题）；扭打；抓住
• 同义词：struggle, wrestle, tackle
• 近义词：contend, cope
• 反义词：yield, surrender（从“努力解决/搏斗”对立面理解）
• 易误用词：grapple vs. grip（前者含“扭打/奋力解决”之意，后者仅为“紧握/掌控”，程度不同）
• 例句及出处：
  1. The economy is just one of several critical problems the country is grappling with.（出自：CATTI & MTI 备考词汇学习 Day16）
  2. He was grappling with an alligator in a lagoon.
  3. Scholars continue to grapple with the interpretation of the text.
  4. She grappled with self-doubt before stepping onto the stage.
  5. The committee is grappling with how to allocate limited funds.
  6. Two players grappled for possession of the ball during the match.
  7. We must grapple honestly with the ethical implications of AI.
  8. He grappled the rope tightly to keep from falling.
  9. The protagonist grapples with loss throughout the entire novel.
  10. Policymakers are grappling with rising inequality in urban areas.

2. equinox /ˈiːkwɪnɒks/

• 释义：n. 昼夜平分点；春分或秋分
• 同义词：equinoctial point
• 近义词：solstice（虽为至点，但常并列提及，需注意区分）
• 反义词：solstice（至点，昼夜极端不等，与分点相对）
• 易误用词：equinox vs. equal（词根相关但前者为天文专有名词“分点”，勿泛化为“相等”使用）
• 例句及出处：
  1. In the Chinese calendar, the Spring Equinox always occurs in the second month.（出自：CATTI & MTI 备考词汇学习 Day16）
  2. The autumn equinox marks the beginning of shorter days than nights.
  3. Ancient structures were often aligned with the sunrise on the equinox.
  4. Day and night are approximately equal in length during an equinox.
  5. Astronomers gather to observe celestial events around the vernal equinox.
  6. The March equinox is considered a time of renewal in many cultures.
  7. Farmers traditionally planted crops after the spring equinox.
  8. The date of the equinox can shift slightly each year.
  9. Unlike the solstice, the equinox brings balanced daylight hours.
  10. Many festivals are timed to coincide with the autumn equinox.

3. redemption /rɪˈdempʃn/

• 释义：n. 救赎；赎回；弥补；偿还
• 同义词：salvation, rescue, atonement
• 近义词：deliverance, restitution
• 反义词：damnation, condemnation, loss
• 易误用词：redemption vs. reduction（前者“救赎/赎回”，后者“减少/降低”，拼写前段相似易拼错）
• 例句及出处：
  1. The team won the game to get redemption.（出自：CATTI & MTI 备考词汇学习 Day22）
  2. The film is about a man seeking redemption for past sins.
  3. She viewed finishing the marathon as a form of personal redemption.
  4. The bond allows for redemption at face value upon maturity.
  5. Art can be a path to spiritual redemption for some individuals.
  6. His heroic act was seen as a moment of redemption in the story.
  7. The company’s turnaround was described as a financial redemption.
  8. They found redemption not in success, but in self-forgiveness.
  9. The concept of redemption is central to many religious traditions.
  10. Critics debated whether the sequel offered any narrative redemption.

4. receptive /rɪˈseptɪv/

• 释义：adj. 愿意接受的；接纳的；感受力强的
• 同义词：open, responsive, amenable
• 近义词：welcoming, accepting
• 反义词：unreceptive, resistant, hostile
• 易误用词：receptive vs. recipient（前者为形容词“乐于接受的”，后者为名词“接收者/领受者”）
• 例句及出处：
  1. Not everyone is receptive to shelter help.（出自：CATTI & MTI 备考词汇学习 Day22）
  2. The audience was highly receptive to the speaker’s new ideas.
  3. Children are usually more receptive to learning new languages.
  4. Make sure the team is receptive before introducing major changes.
  5. She has a receptive mind and listens carefully to different opinions.
  6. The community proved surprisingly receptive to the urban redesign plan.
  7. Being receptive to feedback is key to professional growth.
  8. His receptive attitude made collaboration much easier.
  9. Patients must be receptive to treatment for it to be effective.
  10. A good teacher creates a receptive environment for discussion.

5. pinnacle /ˈpɪnəkl/

• 释义：n. 顶峰；巅峰；小尖塔
• 同义词：peak, summit, zenith
• 近义词：apex, culmination
• 反义词：nadir, bottom, base
• 易误用词：pinnacle vs. pinnable（前者“顶峰”，后者“可钉住的”，拼写前段相同但意义无关）
• 例句及出处：
  1. The pinnacle of his career came when he won the Nobel Prize.（出自：CATTI & MTI 备考词汇学习 Day22）
  2. They climbed to the pinnacle of the mountain just before dawn.
  3. Reaching the pinnacle of the fashion industry takes years of effort.
  4. The cathedral is crowned by a slender stone pinnacle.
  5. She stands at the pinnacle of academic achievement in her field.
  6. Even at the pinnacle of success, he remained humble and grounded.
  7. The book describes the pinnacle of Roman architectural brilliance.
  8. Few athletes ever reach the pinnacle of competing in the Olympics.
  9. The tower’s pinnacle was damaged during the storm and later restored.
  10. True happiness is not always found at the pinnacle of wealth or fame.

以上所有单词均未出现在你提供的历史执行记录中，且各级内部与跨级之间亦无重复。要不要我帮你把这些单词整理成一个方便每日背诵的表格或卡片格式？