退屈 たいくつしのぎじゃなかったです
taikutsushinogijanakattadesu

Noun
Desu Copula

The polite, past negative form of 退屈しのぎ

1. It wasn't a way to relieve boredom.; It wasn't just killing time.

Past/Perfective
Negative
Polite
Casual Register