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disgruntled = 不機嫌な　不満を抱いてる

oxford の定義 → annoyed or disappointed because sth has happened to upset you

I left feeling disgruntled at the way I'd been treated. (oxford) disgruntled employees (oxford)

at のほかに about もあり。

eclipse= ～の光彩を失わせる

oxfordの定義 = to make sb/sth seem dull or unimportant by comparison

Though a telented player, he was completely eclipsed by his brother. (oxford)

もちろん日食・月食の食の意味もある。

excruciatingly = 耐えがたいほどに

excruciatingly painful / boring / embarrasing / uncomfortable / awkward　などなど

苦痛が伴うような形容詞につくけど、funnyなどに付くことも。

subvert = 転覆させる　倒す

their puepose was to subvert the economy (oxford)

austere = 簡素な　禁欲的な　厳しい　飾り気のない

My father was a distant, austere man. the monk's austere way of life. (共にoxford)

oxford の定義では strict and serious in appearance and behavior、allowing nothing that gives pleasure など。

absolve = 無罪を言い渡す

oxford の定義 = to state formally that somebody is not guilty or responsible for something

The court absolved him of all responsibility for the accident. (oxford)

decry = 公然と非難する

oxford の定義 → strongly criticize sb/sth especially publicly

The measures were decried as useless. (oxford)

SYN は condemn 。