Usage patterns 〈 人ひと 〉 を 不ふ 愉ゆ 快かい にさせる to make someone feel unpleasant/annoyed
His rude attitude made the people around him feel annoyed.
不ふ 愉ゆ 快かい な 思おも いをする to have an unpleasant experience
I had an unpleasant experience when someone stepped on my foot on the train.
〈 事こと 〉 が 不ふ 愉ゆ 快かい だ something is unpleasant/offensive
The way he spoke was unpleasant.
Kanji 愉 pleasure, happy, rejoice 快 cheerful, pleasant, agreeable Related words 不快 is more formal and often used in medical or technical contexts (e.g. 不快指数 ), while 不愉快 is the everyday word for feeling personally offended or displeased.
気持ち悪い is casual and usually describes physical disgust or a creepy feeling, whereas 不愉快 is about psychological displeasure or being offended.
嫌 expresses a personal dislike or reluctance toward something, while 不愉快 describes the unpleasant feeling caused by another person's behavior or a situation.
不機嫌 focuses on an outwardly visible sulky or irritable mood, while 不愉快 describes an inner feeling of displeasure or discomfort.
Etymology Compound of 不 (negative prefix) and 愉快 (pleasant, delightful). The word has been used since at least the Meiji period to express emotional displeasure.
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