おどろ紅葉 こうよう かいではありませんでした
odorokō yōkaidewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 棘紅葉貝

1. Was not a spiny maple shell.; Was not a thorny red leaf shell.

Past/Perfective
Negative
Polite
Formal Register