ちちぶじゃありませんでした
知知武じゃありませんでした
chichibujārimasendeshita

Noun
Desu Copula

The polite, past negative form of ちちぶ

1. I did not know martial arts.; I wasn't familiar with martial arts.

Past/Perfective
Negative
Polite
Terminal Form
Usually Written in Kana