遺恨 いこん じゅう ねんじゃなかったです
ikon jūnenjanakattadesu

Noun
Desu Copula

The polite, past negative form of 遺恨十年

1. It wasn't a ten-year regret.; It wasn't a grudge held for ten years.

Past/Perfective
Negative
Polite
Casual Register