侵す (okasu) conjugation
to invade, to raid, to trespass
侵す (おかす, okasu) 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 | 侵す okasu | 侵します okashimasu | The form you look up. Also the casual present and future. |
| Plain negative | 侵さない okasanai | 侵しません okashimasen | “doesn’t / won’t”. From here it conjugates like an i-adjective. |
| Plain past | 侵した okashita | 侵しました okashimashita | The casual past — same ending as the te-form, with た/だ. |
| Plain past negative | 侵さなかった okasanakatta | 侵しませんでした okashimasendeshita | “didn’t”. The negative past, still i-adjective-shaped. |
| Te-form | 侵して okashite | — | The connector: requests, linking clauses, ~ている. |
| Progressive (~ている) | 侵している okashiteiru | 侵しています okashiteimasu | “is ~ing”, or an ongoing resulting state. |
| Desire (~たい) | 侵したい okashitai | 侵したいです okashitaidesu | “want to ~”. Behaves as an i-adjective. |
| Volitional | 侵そう okasou | 侵しましょう okashimashou | “let’s ~” / “I think I’ll ~”. |
| Potential | 侵せる okaseru | 侵せます okasemasu | “can ~”. What you could do; the object often takes が. |
| Passive | 侵される okasareru | 侵されます okasaremasu | “is ~ed”. Also the honorific and the suffering passive. |
| Causative | 侵させる okasaseru | 侵させます okasasemasu | Make or let someone do it. |
| Causative-passive | 侵させられる okasaserareru | 侵させられます okasaseraremasu | Be made to do it — the long one. |
| Imperative | 侵せ okase | 侵してください okashitekudasai | Blunt order. Use ~てください in real life. |
| Prohibitive | 侵すな okasuna | — | “don’t!” — dictionary form + な. |
| Conditional (~ば) | 侵せば okaseba | — | “if ~”. General rules and hypotheticals. |
| Conditional (~たら) | 侵したら okashitara | — | “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.