なおざりでわありませんでした
等閑ではありませんでした
naozaridewārimasendeshita

Noun
Desu Copula
na-Adjective

The polite, past negative form of なおざり

1. Was not negligible.; Was not insignificant.; Was not overlooked.

Past/Perfective
Negative
Polite
Formal Register
Usually Written in Kana