厳重 (genjuu) conjugation
strict, severe, firm
厳重 (げんじゅう, genjuu) 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 | 厳重だ genjuuda | 厳重です genjuudesu | The form you look up. Also the casual “is ~”. |
| Negative | 厳重じゃない genjuujanai | 厳重じゃないです genjuujanaidesu | “is not ~”. |
| Past | 厳重だった genjuudatta | 厳重でした genjuudeshita | “was ~”. |
| Past negative | 厳重じゃなかった genjuujanakatta | 厳重じゃなかったです genjuujanakattadesu | “was not ~”. |
| Te-form | 厳重で genjuude | — | Links to the next clause: “~ and …”. |
| Adverb | 厳重に genjuuni | — | Turns it into “~ly”, describing a verb. |
| Before a noun | 厳重な〜 genjuuna〜 | — | How it attaches when it modifies a noun. |
| Conditional (~ば/なら) | 厳重なら genjuunara | — | “if it is ~”. |
| Conditional (~たら) | 厳重だったら genjuudattara | — | “if / when it is ~”. The everyday conditional. |
| Become (~なる) | 厳重になる genjuuninaru | 厳重になります genjuuninarimasu | “becomes ~” — the change-of-state form. |
| Too much (~すぎる) | 厳重すぎる genjuusugiru | 厳重すぎます genjuusugimasu | “too ~”. |
| Looks ~ (~そう) | 厳重そう genjuusou | 厳重そうです genjuusoudesu | “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.