| Form | Conjugation | 
|---|---|
| Plain? | 窪む | 
| Past? | 窪んだ | 
| Negative? | 窪まない | 
| Volitional? | 窪もう | 
| Imperative? | 窪め | 
| Polite imperative? | 窪みなさい | 
| 〜たい? | 窪みたい | 
| Conditional (〜えば)? | 窪めば | 
| Conditional (〜たら)? | 窪んだら | 
| Potential? | 窪める | 
| Passive? | 窪まれる | 
| Causative? | 窪ませる | 
| Prohibitive? | 窪むな | 
| 〜ます? | 窪みます |