鉄石 てっせき心腸 しんちょうじゃありませんでした
tesseki shinchōjārimasendeshita

Noun
Desu Copula

The polite, past negative form of 鉄石心腸

1. Was not of iron will.; Was not heartless.; Was not unfeeling.

Past/Perfective
Negative
Polite
Terminal Form