| 熟する | [じゅくする, jukusuru] (vs-s, vi) (1) to ripen; to mature; (2) to be ready for action; to be the right time (to act); (3) to be in common use; to come to sound natural; (4) to become skilled [Add to Longdo] |
| A monkey is mature at a few years old. | サルは２、３歳で成熟する。 |
| Men get their growth before they are thirty. | 人の体は三十前に成熟する。 |