無茶 (mucha) conjugation
absurd, unreasonable
無茶 (むちゃ, mucha) is a na-adjective. Na-adjectives behave like nouns. The word itself never changes — you conjugate だ/です after it, and you need な to put it in front of a noun.
Conjugation table
| Form | Plain (casual) | Polite (~です) | When you use it |
|---|---|---|---|
| Dictionary / plain | 無茶だ muchada | 無茶です muchadesu | The form you look up. Also the casual “is ~”. |
| Negative | 無茶じゃない muchajanai | 無茶じゃないです muchajanaidesu | “is not ~”. |
| Past | 無茶だった muchadatta | 無茶でした muchadeshita | “was ~”. |
| Past negative | 無茶じゃなかった muchajanakatta | 無茶じゃなかったです muchajanakattadesu | “was not ~”. |
| Te-form | 無茶で muchade | — | Links to the next clause: “~ and …”. |
| Adverb | 無茶に muchani | — | Turns it into “~ly”, describing a verb. |
| Before a noun | 無茶な〜 muchana〜 | — | How it attaches when it modifies a noun. |
| Conditional (~ば/なら) | 無茶なら muchanara | — | “if it is ~”. |
| Conditional (~たら) | 無茶だったら muchadattara | — | “if / when it is ~”. The everyday conditional. |
| Become (~なる) | 無茶になる muchaninaru | 無茶になります muchaninarimasu | “becomes ~” — the change-of-state form. |
| Too much (~すぎる) | 無茶すぎる muchasugiru | 無茶すぎます muchasugimasu | “too ~”. |
| Looks ~ (~そう) | 無茶そう muchasou | 無茶そうです muchasoudesu | “looks / seems ~” from appearance. |
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Why it conjugates this way
Na-adjectives behave like nouns. The word itself never changes — you conjugate だ/です after it, and you need な to put it in front of a noun.
See the full rules in the adjective conjugation guide.