にごろぶなじゃありませんでした
煮頃鮒じゃありませんでした
nigorobunajārimasendeshita

Noun
Desu Copula

The polite, past negative form of にごろぶな

1. Was not a boiled crucian carp.; Was not a good time to boil crucian carp.

Past/Perfective
Negative
Polite
Terminal Form
Usually Written in Kana