みずすましでわありませんでした
水澄ましではありませんでした
mizusumashidewārimasendeshita

Noun
Desu Copula

The polite, past negative form of みずすまし

1. Was not clearing water.; Was not purifying water.; Was not simply water.

Past/Perfective
Negative
Polite
Formal Register
Usually Written in Kana