ぼうきむしじゃなかったです
箒虫じゃなかったです
bōkimushijanakattadesu

Noun
Desu Copula

The polite, past negative form of ほうきむし

1. It wasn't a broom insect.; It wasn't a dust mite.

Past/Perfective
Negative
Polite
Casual Register
Usually Written in Kana