呑気、暢気、暖気、のん気、吞気
のんき、ノンキ
nonki
JMdict entry #1600560
- adjectival nouns or quasi-adjectives (keiyodoshi)noun (common) (futsuumeishi) word usually written using kana alone easy; easygoing; carefree; happy-go-lucky; optimistic; leisurely; careless; thoughtless