のんき
呑気
nonki

Noun
na-Adjective

1. easy; easygoing; carefree; happy-go-lucky; optimistic; leisurely; careless; thoughtless

Usually Written in Kana
まえ当事とうじしゃじゃないから、そんなのんきなことってられるんだよ。
omaewa tōjishajanaikara sonna nonkina koto itterareru ndayo.
You wouldn't be so casual about it if you were directly involved.
Other forms: