不健全|ふけんぜんfukenzen[2]nakadaka (mid-high)
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- na-adjective, nounmorbid; unhealthful; insalubrious
Conjugation
| Plain form | 不健全(ふけんぜん) |
|---|---|
| Polite (desu) | 不健全です(ふけんぜんです) |
| Negative (dewa nai) | 不健全ではない(ふけんぜんではない) |
| polite (dewa arimasen) | 不健全ではありません(ふけんぜんではありません) |
| Past (datta) | 不健全だった(ふけんぜんだった) |
| Past negative (dewa nakatta) | 不健全ではなかった(ふけんぜんではなかった) |
| Te form (de) | 不健全で(ふけんぜんで) |
| Adverbial (ni) | 不健全に(ふけんぜんに) |
| Conditional (nara) | 不健全なら(ふけんぜんなら) |
Common forms generated by rule; see the senses for honorific or irregular usage.
- Synonym不健康ふけんこうNeutralRefers to poor health or things harmful to health, as in 「不健康な食生活」; mostly about the body, whereas 「不健全」 typically describes unsound ideas or moral climate.
- Related不良ふりょうNeutralCovers poor quality or bad conduct, as in 「不良品」 and 「不良少年」; it leans toward quality issues, while 「不健全」 points to something not functioning properly.
- Antonym健全けんぜんNeutralThe direct antonym: sound and healthy, as in 「健全な財政」; describes a mind, body, or system in the proper working state that 「不健全」 negates.
For poor physical health use 「不健康」. For unsound ideas, moral climate, or finances — 「不健全な図書」, 「不健全な経営」 — use 「不健全」. Defective goods or delinquent kids take 「不良」; the opposite of 「不健全」 is 「健全」.
Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only


