How to say "instability" in Japanese

• 不安定ふあんていCommon
  na-adjective, nounThe general word for instability: unsteady weather, ground, or conditions, and unstable states of mind, covering everything from insecurity to crankiness.
  日本人にほんじんからが、アメリカ人あめりかじんは不安定ふあんていで、自由じゆう奔放ほんぽうに見みえる。↗

  Americans appear unsettled and uncontrolled to Japanese.
• むらCommon
  noun, na-adjectiveIts 'instability' is really unevenness or inconsistency: quality, results, or behaviour that fluctuates. For instability in the general sense this is not the word you want; it is usually written in kana.

Use 不安定 for instability in the general sense — unsteady conditions, situations, or emotions — and 「むら」 when instability means unevenness or inconsistency in quality, results, or behaviour.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 不安定ふあんていinstability
• むらunevenness (of quality, results, behaviour, etc.)
• 揺れゆれunsettledness
• 浮雲うきぐもinstability
• 振幅しんぷく(degree of) instability
• 振れ幅ふれはば(degree of) instability