rebut v. 驳斥，反驳 (to prove (something) is false by using arguments or evidence) / rɪˈbʌt/
rebuff n. （粗鲁地）回复 (a blunt or abrupt repulse or refusal) / rɪˈbʌf/
rebuke v. 指责，非难 (to speak in an angry and critical way to (someone)) / rɪˈbjuːk/
exacerbate v. 使...恶化 (to make (a bad situation, a problem, etc.) worse) / ɛkˈsasəbeɪt/
exasperate v. 使...生气 (to make (someone) very angry or annoyed) / ɪɡˈzasp(ə)reɪt/
deprecate v. 贬损诋毁 (to criticize or express disapproval of (someone or something)) /ˈdɛprɪkeɪt/
depreciate v. 轻视，贬低 (to lower in estimation or esteem) / dɪˈpriːsɪeɪt/
v. 贬值 (to lower the price or estimated value of)
credulous adj. 易受欺骗的 (too ready to believe things) /ˈkrɛdjʊləs/
credible adj. 可靠的，可信的 (offering reasonable grounds for being believed) / ˈkrɛdɪb(ə)l/
credential n. 证明 (something that gives a title to credit or confidence) / krɪˈdɛnʃ(ə)l/