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不自然 (ふしぜん, fushizen) Japanese meaning: unnatural | Kotomora
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笑え
顔がお
は
どこ
か
不ふ
自し
然ぜん
だっ
た
。
His smile seemed somewhat unnatural.
There are several unnatural points in that explanation.
Usage patterns 〈 物もの 〉 が 不ふ 自し 然ぜん だ for something to seem unnatural
The way he spoke sounded unnatural.
不ふ 自し 然ぜん な 〈 物もの 〉 an unnatural/forced (thing, expression, pose, etc.)
She showed a forced smile.
不ふ 自し 然ぜん に 〈 動どう 詞し 〉 to (do something) in an unnatural way
He fell silent in an unnatural way.
Kanji 然 sort of thing, so, if so Related words わざとらしい specifically implies obvious, overdone fakery, while 不自然 more broadly just means lacking naturalness without necessarily implying intent.
ぎこちない describes clumsy, stiff movement or manner, while 不自然 covers a wider range of things—behavior, speech, or situations—that simply seem off.
不自然 emphasizes something feeling wrong or abnormal, while 人工的 simply describes something as man-made without necessarily implying it's bad.
Etymology Formed from the prefix 不 (fu-, 'not') and 自然 (shizen, 'nature' or 'natural'). The kanji compound directly conveys the meaning of 'not natural'.