生物 せいぶつ分解 ぶんかいじゃなかったです
seibutsubunkaijanakattadesu

Noun
Desu Copula
no-Adjective

The polite, past negative form of 生物分解

1. Wasn't biodegradable.; Wasn't living.; Wasn't organic.

Past/Perfective
Negative
Polite
Casual Register