不適|ふてきfuteki[0]heiban (flat)

1. na-adjective, nouninadequacy; inappropriateness; unfitness; impropriety

• Synonym不適当ふてきとうWrittenWritten/formal prose. Inappropriateness; synonymous with 「不適」 but more often used of behavior.
• Synonym場違いばちがいNeutralOut of place for the occasion, as in 「場違いな服装」; the focus is on the setting rather than fitness for a purpose.
• Synonym不穏当ふおんとうWrittenWritten/formal prose. Describes remarks that are improper or inflammatory, as in 「不穏当な発言」.
• Synonym不相応ふそうおうWrittenWritten/formal prose. Beyond or beneath one's station, as in 「身分不相応」.
• SynonymそぐわないNeutralUnsuitable or out of harmony, as in 「雰囲気にそぐわない」.
• Related不釣合いふつりあいNeutralImbalance or mismatch, as in 「不釣合いなカップル」; 「不適」 is about being unfit for a purpose or condition.
• Related不当ふとうNeutralUnjust or unreasonable, as in 「不当解雇」; the emphasis is on fairness rather than fitness for a purpose.
• RelatedアンバランスNeutralColloquial loanword for imbalance; 「不適」 is about being unfit for a purpose or condition.
• Related似気無いにげないWrittenWritten/formal prose and rarely used; describes something unlike a person's usual style or unbecoming to them.
• Antonym適切てきせつNeutralAntonym. Appropriate and fitting, as in 「適切な処置」; the direct opposite of 「不適」.
• Antonym妥当だとうWrittenAntonym. Valid and reasonable, as in 「妥当な判断」; the opposite of 「不適」.
• Antonym好適こうてきWrittenAntonym. Written/formal prose for highly suitable, as in 「好適地」; the opposite of 「不適」.

Use 「不適」 for something unsuited to a purpose or condition, as in 「適・不適」 and 「食用に不適」. For inappropriate behavior say 「不適切」, and for being out of place with the occasion say 「場違い」. The opposite of 「不適」 is 「適切」.

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

1. 適てきさないこと。不適当ふてきとう。