白浪 しらなみ ものじゃありませんでした
shiranamimonojārimasendeshita

Noun
Desu Copula

The polite, past negative form of 白浪物

1. Was not a white wave.; Was not something white and wavy.; Was not a frivolous/insubstantial person.

Past/Perfective
Negative
Polite
Terminal Form