尊い (toutoi) conjugation
precious, valuable, noble
尊い (とうとい, toutoi) is an i-adjective. I-adjectives carry their own tense: drop the final い and the endings attach straight to the stem. No だ, no です needed to make a complete sentence.
Conjugation table
| Form | Plain (casual) | Polite (~です) | When you use it |
|---|---|---|---|
| Dictionary / plain | 尊い toutoi | 尊いです toutoidesu | The form you look up. Also the casual “is ~”. |
| Negative | 尊くない toutokunai | 尊くないです toutokunaidesu | “is not ~”. |
| Past | 尊かった toutokatta | 尊かったです toutokattadesu | “was ~”. |
| Past negative | 尊くなかった toutokunakatta | 尊くなかったです toutokunakattadesu | “was not ~”. |
| Te-form | 尊くて toutokute | — | Links to the next clause: “~ and …”. |
| Adverb | 尊く toutoku | — | Turns it into “~ly”, describing a verb. |
| Before a noun | 尊い〜 toutoi〜 | — | How it attaches when it modifies a noun. |
| Conditional (~ば/なら) | 尊ければ toutokereba | — | “if it is ~”. |
| Conditional (~たら) | 尊かったら toutokattara | — | “if / when it is ~”. The everyday conditional. |
| Become (~なる) | 尊くなる toutokunaru | 尊くなります toutokunarimasu | “becomes ~” — the change-of-state form. |
| Too much (~すぎる) | 尊すぎる toutosugiru | 尊すぎます toutosugimasu | “too ~”. |
| Looks ~ (~そう) | 尊そう toutosou | 尊そうです toutosoudesu | “looks / seems ~” from appearance. |
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Why it conjugates this way
I-adjectives carry their own tense: drop the final い and the endings attach straight to the stem. No だ, no です needed to make a complete sentence.
See the full rules in the adjective conjugation guide.