のんきでわありませんでした
呑気ではありませんでした
nonkidewārimasendeshita

Noun
Desu Copula
na-Adjective

The polite, past negative form of のんき

1. Was not carefree.; Was not laid-back.; Was not easygoing.

Past/Perfective
Negative
Polite
Formal Register
Usually Written in Kana