ばかばかしくなかったです
馬鹿馬鹿しくなかったです
bakabakashikunakattadesu

i-Adjective

The polite, past negative form of ばかばかしい

1. Wasn't silly.; Wasn't foolish.; Wasn't ridiculous.

Past/Perfective
Negative
Polite
Usually Written in Kana