足りない · i-adjective
| Form | Positive | Negative |
|---|---|---|
| Dictionary | 足りない | 足りなくない |
| Polite | 足りないです | 足りなくないですalso 足りなくありません |
| Past polite | 足りなかったです | 足りなくなかったですalso 足りなくありませんでした |
| Past | 足りなかった | 足りなくなかった |
| Te-form | 足りなくて | 足りなくなくて |
| Adverbial | 足りなく | |
| Conditional | 足りなければ | 足りなくなければ |
| Tara conditional | 足りなかったら | 足りなくなかったら |
insufficient; not enough; lacking
Used when a quantity, quality, or condition falls short of what is needed or expected. Often appears with nouns marked by が or に.
See also: 足りる
We don't have enough time, so let's hurry.
This explanation alone doesn't provide enough information.
Colloquial and somewhat blunt; used to say someone is not very bright or lacks common sense. Often in phrases like 頭が足りない or 知恵が足りない.
Isn't that person a bit dim-witted?