遺恨 いこん じゅう ねんではありませんでした
ikon jūnendewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 遺恨十年

1. Did not harbor resentment for ten years.; Did not hold a grudge for ten years.

Past/Perfective
Negative
Polite
Formal Register