違法|いほうihou[0]heiban (flat)
This browser can't play pronunciations (needs Safari 18.4 or later, or Chrome / Edge / Firefox).
- na-adjective, no-adjectiveillegal; illicit; unlawful
Conjugation
| Plain form | 違法(いほう) |
|---|---|
| Polite (desu) | 違法です(いほうです) |
| Negative (dewa nai) | 違法ではない(いほうではない) |
| polite (dewa arimasen) | 違法ではありません(いほうではありません) |
| Past (datta) | 違法だった(いほうだった) |
| Past negative (dewa nakatta) | 違法ではなかった(いほうではなかった) |
| Te form (de) | 違法で(いほうで) |
| Adverbial (ni) | 違法に(いほうに) |
| Conditional (nara) | 違法なら(いほうなら) |
Common forms generated by rule; see the senses for honorific or irregular usage.
- Synonym不法ふほうWrittenWritten/formal prose. Covers illegal acts but also outrageous, unjust behavior, as in 「不法侵入」 and 「不法投棄」; 「違法」 focuses on breaking a specific law.
- Synonym非合法ひごうほうWrittenWritten/formal prose. Means not legal, in violation of legal provisions, as in 「非合法活動」; close in meaning to 「違法」 but used less often.
- Antonym合法ごうほうNeutralNeutral. Means in accordance with the law, as in 「合法的な手段」; the direct opposite of 「違法」 and the everyday word of choice.
- Antonym適法てきほうWrittenWritten/formal prose. Means conforming to laws and regulations; legal jargon, the opposite of 「違法」. In everyday speech people say 「合法」.
Use 「違法」 for breaking the law, as in 「違法駐車」. For unlawful entry or dumping say 「不法」; 「非合法活動」-type 「非合法」 is a rarer near-match. The everyday antonym is 「合法」; legal documents prefer 「適法」.
Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only


