熟れる

うれる, こなれる, なれるureru

ichidan verb · intransitive

1. to ripen (fruit, grain, etc.)
2. to become ripe
3. to be digested
4. to master (a skill)
5. to be proficient
6. to be accomplished
7. to be well developed
8. to mature (e.g. personality)

Study it in Yanamino