こうきくさじゃなかったです
小浮草じゃなかったです
kōkikusajanakattadesu

Noun
Desu Copula

The polite, past negative form of こうきくさ

1. Wasn't duckweed.; Wasn't a water hyacinth.

Past/Perfective
Negative
Polite
Casual Register
Usually Written in Kana