まむしぐさでわありませんでした
蝮草ではありませんでした
mamushigusadewārimasendeshita

Noun
Desu Copula

The polite, past negative form of まむしぐさ

1. Was not a snakegrass.; Was not vipergrass.

Past/Perfective
Negative
Polite
Formal Register
Usually Written in Kana