みずしげでわありませんでした
水繁蔞ではありませんでした
mizushigedewārimasendeshita

Noun
Desu Copula

The polite, past negative form of みずはこべ

1. Was not flourishing.; Was not thriving.; Was not prosperous.

Past/Perfective
Negative
Polite
Formal Register
Usually Written in Kana