こしあぶらじゃなかったです
漉油じゃなかったです
koshiaburajanakattadesu

Noun
Desu Copula

The polite, past negative form of こしあぶら

1. Wasn't straining oil.; Didn't strain oil.

Past/Perfective
Negative
Polite
Casual Register
Usually Written in Kana