みずすましじゃなかったです
水澄ましじゃなかったです
mizusumashijanakattadesu

Noun
Desu Copula

The polite, past negative form of みずすまし

1. Wasn't clear.; Wasn't purified.; Wasn't filtered.

Past/Perfective
Negative
Polite
Casual Register
Usually Written in Kana