こけおどしでわありませんでした
虚仮威しではありませんでした
kokeodoshidewārimasendeshita

Noun
Desu Copula
na-Adjective

The polite, past negative form of こけおどし

1. Was not mere bluster.; Was not a false show of force.

Past/Perfective
Negative
Polite
Formal Register
Usually Written in Kana