無くす
なくす
to lose something
Nakusu (無くす) is a godan verb meaning "to lose something". Its polite form is 無くします (nakushimasu), its te form is 無くして (nakushite), its past form is 無くした (nakushita), and its negative form is 無くさない (nakusanai).
Godan verbJLPT N5
Nakusu (無くす) conjugation quick reference
無くす means "to lose something". Its main forms are listed below, with links to the grammar pattern behind each form.
Nakusu example sentences
財布をなくします。
I will lose my wallet.
かぎをなくしました。
I lost my key.
本をなくしません。
I don't lose books.
How to use Nakusu: grammar notes
•Use 無くす with the particle を to mark the thing you lost — for example, 財布を無くしました (I lost my wallet).
•Be careful not to confuse 無くす (to lose something) with なくなる, which means something is lost or disappears on its own.
•When talking about the past, say 無くしました (lost) rather than 無くす, which is the plain present/future form.
•JLPT N5 level
Common phrases with Nakusu
財布を無くす（さいふをなくす）
to lose one's wallet
やる気を無くす（やるきをなくす）
to lose motivation
自信を無くす（じしんをなくす）
to lose confidence
Nakusu (無くす) conjugation table
| Form | Japanese | Romaji |
|---|---|---|
| Basic Forms | ||
| Dictionary Form | 無くす | nakusu |
| Masu Form | 無くします | nakushimasu |
| Te Form | 無くして | nakushite |
| Past Form | 無くした | nakushita |
| Negative Form | 無くさない | nakusanai |
| Past Negative | 無くさなかった | nakusanakatta |
| Polite Forms | ||
| Polite Present | 無くします | nakushimasu |
| Polite Past | 無くしました | nakushimashita |
| Polite Negative | 無くしません | nakushimasen |
| Polite Past Negative | 無くしませんでした | nakushimasendeshita |
| Advanced Forms | ||
| Potential Form | 無くせる | nakuseru |
| Passive Form | 無くされる | nakusareru |
| Causative Form | 無くさせる | nakusaseru |
| Causative Passive | 無くさされる | nakusasareru |
| Volitional Form | 無くそう | nakusou |
| Imperative Form | 無くせ | nakuse |
| Conditional Forms | ||
| Conditional (ば) | 無くせば | nakuseba |
| Conditional (たら) | 無くしたら | nakushitara |
| Other Forms | ||
| Progressive Form | 無くしている | nakushiteiru |
| Desire (たい) | 無くしたい | nakushitai |
| Prohibition | 無くすな | nakusuna |