不自然(ふしぜん)

ふしぜん
na-adjective
unnatural, contrived
1. unnatural, contrived, forced, awkward
Not natural in appearance, behavior, or manner. Describes something that feels artificial, stiff, or deliberately put on.
不自然(ふしぜん)な笑顔(えがお)だった。
It was a forced smile.
あの説明(せつめい)はどこか不自然(ふしぜん)だ。
That explanation is somehow unnatural.
彼(かれ)の態度(たいど)が急(きゅう)に変(か)わったのは不自然(ふしぜん)で、何(なに)か隠(かく)しているに違(ちが)いない。
The sudden change in his attitude is unnatural — he must be hiding something.

WORD FORMATION:
不(ふ) (not) + 自然(しぜん) (natural). The antonym is 自然(しぜん) (natural).

USAGE:
Used to describe behavior, speech, smiles, movements, or situations that feel off or contrived. In language learning contexts, it often describes sentences or expressions that sound grammatically correct but awkward to native speakers.

COMMON COLLOCATIONS:

  • 不自然(ふしぜん)な笑顔(えがお): forced smile
  • 不自然(ふしぜん)な態度(たいど): unnatural attitude
  • 不自然(ふしぜん)な動(うご)き: unnatural movement
  • 不自然(ふしぜん)な日本語(にほんご): unnatural Japanese

Related Words

Antonym: 自然(しぜん)
general
Added 2026.2.16 10:06 · Revised 2026.2.19 21:42
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