become; get -er (with i-adjectives)
最近、日が暮れるのが早くなったね。
saikin, hi ga kureru no ga hayaku natta ne.
The sun's been setting earlier lately, hasn't it? casual
薬を飲んだら、だいぶ良くなりました。
kusuri o nondara, daibu yoku narimashita.
After taking the medicine, I got quite a bit better. neutral
くなる
くなるku naruN5neutral