深層 しんそう崩壊 ほうかいじゃなかったです
shinsōhōkaijanakattadesu

Noun
Desu Copula

The polite, past negative form of 深層崩壊

1. Wasn't a deep collapse.; Wasn't a fundamental breakdown.

Past/Perfective
Negative
Polite
Casual Register
Geology