心得る (kokoroeru) conjugation
to understand, to have thorough knowledge
心得る (こころえる, kokoroeru) is an ichidan verb. Ichidan verbs are the tidy ones: drop the final る and add the ending. Nothing inside the word ever changes. 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 | 心得る kokoroeru | 心得ます kokoroemasu | The form you look up. Also the casual present and future. |
| Plain negative | 心得ない kokoroenai | 心得ません kokoroemasen | “doesn’t / won’t”. From here it conjugates like an i-adjective. |
| Plain past | 心得た kokoroeta | 心得ました kokoroemashita | The casual past — same ending as the te-form, with た/だ. |
| Plain past negative | 心得なかった kokoroenakatta | 心得ませんでした kokoroemasendeshita | “didn’t”. The negative past, still i-adjective-shaped. |
| Te-form | 心得て kokoroete | — | The connector: requests, linking clauses, ~ている. |
| Progressive (~ている) | 心得ている kokoroeteiru | 心得ています kokoroeteimasu | “is ~ing”, or an ongoing resulting state. |
| Desire (~たい) | 心得たい kokoroetai | 心得たいです kokoroetaidesu | “want to ~”. Behaves as an i-adjective. |
| Volitional | 心得よう kokoroeyou | 心得ましょう kokoroemashou | “let’s ~” / “I think I’ll ~”. |
| Potential | 心得られる kokoroerareru | 心得られます kokoroeraremasu | “can ~”. What you could do; the object often takes が. |
| Passive | 心得られる kokoroerareru | 心得られます kokoroeraremasu | “is ~ed”. Also the honorific and the suffering passive. |
| Causative | 心得させる kokoroesaseru | 心得させます kokoroesasemasu | Make or let someone do it. |
| Causative-passive | 心得させられる kokoroesaserareru | 心得させられます kokoroesaseraremasu | Be made to do it — the long one. |
| Imperative | 心得ろ kokoroero | 心得てください kokoroetekudasai | Blunt order. Use ~てください in real life. |
| Prohibitive | 心得るな kokoroeruna | — | “don’t!” — dictionary form + な. |
| Conditional (~ば) | 心得れば kokoroereba | — | “if ~”. General rules and hypotheticals. |
| Conditional (~たら) | 心得たら kokoroetara | — | “if / when ~”. The everyday conditional. |
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Why it conjugates this way
Ichidan verbs are the tidy ones: drop the final る and add the ending. Nothing inside the word ever changes.
See the full rules on the verb conjugation guide.