温暖 (ondan) conjugation
warmth
温暖 (おんだん, ondan) 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 | 温暖だ ondanda | 温暖です ondandesu | The form you look up. Also the casual “is ~”. |
| Negative | 温暖じゃない ondanjanai | 温暖じゃないです ondanjanaidesu | “is not ~”. |
| Past | 温暖だった ondandatta | 温暖でした ondandeshita | “was ~”. |
| Past negative | 温暖じゃなかった ondanjanakatta | 温暖じゃなかったです ondanjanakattadesu | “was not ~”. |
| Te-form | 温暖で ondande | — | Links to the next clause: “~ and …”. |
| Adverb | 温暖に ondanni | — | Turns it into “~ly”, describing a verb. |
| Before a noun | 温暖な〜 ondanna〜 | — | How it attaches when it modifies a noun. |
| Conditional (~ば/なら) | 温暖なら ondannara | — | “if it is ~”. |
| Conditional (~たら) | 温暖だったら ondandattara | — | “if / when it is ~”. The everyday conditional. |
| Become (~なる) | 温暖になる ondanninaru | 温暖になります ondanninarimasu | “becomes ~” — the change-of-state form. |
| Too much (~すぎる) | 温暖すぎる ondansugiru | 温暖すぎます ondansugimasu | “too ~”. |
| Looks ~ (~そう) | 温暖そう ondansou | 温暖そうです ondansoudesu | “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.