のんきじゃありませんでした
呑気じゃありませんでした
nonkijārimasendeshita

Noun
Desu Copula
na-Adjective

The polite, past negative form of のんき

1. Was not relaxed.; Was not carefree.; Was not easygoing.

Past/Perfective
Negative
Polite
Terminal Form
Usually Written in Kana