生物 せいぶつ分解 ぶんかいではありませんでした
seibutsubunkaidewārimasendeshita

Noun
Desu Copula
no-Adjective

The polite, past negative form of 生物分解

1. Was not biodegradable.; Did not biodegrade.

Past/Perfective
Negative
Polite
Formal Register