せる
yaseru

Ichidan Verb

1. to become thin; to lose weight; to slim

Intransitive
わか ころ せてたんだよ。
wakai korowa yasete tandayo.
I used to be thin when I was young.
Ichidan Verb

2. to become impoverished (of soil); to become sterile; to become infertile; to become barren

Intransitive
Other forms: