不安定(ふあんてい)

ふあんてい
na-adjective / noun
unstable, unsteady
1. unstable, unsteady, insecure
Not firmly fixed, balanced, or reliable. Used for physical objects, weather, emotions, political situations, employment, and other conditions that may change unpredictably.
天気(てんき)が不安定(ふあんてい)だ。
The weather is unstable.
収入(しゅうにゅう)が不安定(ふあんてい)で将来(しょうらい)が心配(しんぱい)だ。
My income is unstable, and I'm worried about the future.
精神的(せいしんてき)に不安定(ふあんてい)な状態(じょうたい)が続(つづ)いていたので、病院(びょういん)を受診(じゅしん)した。
I had been in a mentally unstable state for a while, so I went to see a doctor.

Na-adjective formed by adding 不(ふ) (un-/in-) to 安定(あんてい) (stable). Describes anything that lacks stability or reliability.

FORMS:

  • 不安定(ふあんてい)な + noun: unstable ~
  • 不安定(ふあんてい)に + verb: unstably

COMMON COLLOCATIONS:

  • 精神的(せいしんてき)に不安定(ふあんてい): mentally unstable
  • 不安定(ふあんてい)な天気(てんき): unstable weather
  • 不安定(ふあんてい)な雇用(こよう): insecure employment
  • 政情(せいじょう)不安定(ふあんてい): political instability
  • 不安定(ふあんてい)な足場(あしば): unsteady footing

CONTRAST:

  • 安定(あんてい): stable, steady (opposite)
  • 不安(ふあん): anxiety, unease (related but describes feelings, not conditions)

Related Words

Antonym: 安定(あんてい) (stability, steady)
general
Added 2026.2.16 7:42 · Revised 2026.4.5 13:45
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