生物 せいぶつ分解 ぶんかいじゃありませんでした
seibutsubunkaijārimasendeshita

Noun
Desu Copula
no-Adjective

The polite, past negative form of 生物分解

1. Was not biodegradable.; Did not decompose.

Past/Perfective
Negative
Polite
Terminal Form