亡くす (nakusu) conjugation
to lose someone
亡くす (なくす, nakusu) is a godan verb. Godan verbs change their final kana up and down its column of the kana chart — the a-row for negatives, the i-row before ます, the e-row for potential and ば. Every form below is tappable — hear it, then say it back.
Conjugation table
| Form | Plain (casual) | Polite (~ます) | When you use it |
|---|---|---|---|
| Dictionary / plain | 亡くす nakusu | 亡くします nakushimasu | The form you look up. Also the casual present and future. |
| Plain negative | 亡くさない nakusanai | 亡くしません nakushimasen | “doesn’t / won’t”. From here it conjugates like an i-adjective. |
| Plain past | 亡くした nakushita | 亡くしました nakushimashita | The casual past — same ending as the te-form, with た/だ. |
| Plain past negative | 亡くさなかった nakusanakatta | 亡くしませんでした nakushimasendeshita | “didn’t”. The negative past, still i-adjective-shaped. |
| Te-form | 亡くして nakushite | — | The connector: requests, linking clauses, ~ている. |
| Progressive (~ている) | 亡くしている nakushiteiru | 亡くしています nakushiteimasu | “is ~ing”, or an ongoing resulting state. |
| Desire (~たい) | 亡くしたい nakushitai | 亡くしたいです nakushitaidesu | “want to ~”. Behaves as an i-adjective. |
| Volitional | 亡くそう nakusou | 亡くしましょう nakushimashou | “let’s ~” / “I think I’ll ~”. |
| Potential | 亡くせる nakuseru | 亡くせます nakusemasu | “can ~”. What you could do; the object often takes が. |
| Passive | 亡くされる nakusareru | 亡くされます nakusaremasu | “is ~ed”. Also the honorific and the suffering passive. |
| Causative | 亡くさせる nakusaseru | 亡くさせます nakusasemasu | Make or let someone do it. |
| Causative-passive | 亡くさせられる nakusaserareru | 亡くさせられます nakusaseraremasu | Be made to do it — the long one. |
| Imperative | 亡くせ nakuse | 亡くしてください nakushitekudasai | Blunt order. Use ~てください in real life. |
| Prohibitive | 亡くすな nakusuna | — | “don’t!” — dictionary form + な. |
| Conditional (~ば) | 亡くせば nakuseba | — | “if ~”. General rules and hypotheticals. |
| Conditional (~たら) | 亡くしたら nakushitara | — | “if / when ~”. The everyday conditional. |
🔊 Tap any Japanese word to hear it spoken.
Why it conjugates this way
Godan verbs change their final kana up and down its column of the kana chart — the a-row for negatives, the i-row before ます, the e-row for potential and ば.
See the full rules on the verb conjugation guide.