蟷螂 とうろう おのではありませんでした
tōrōno onodewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 蟷螂の斧

1. Was not a mantis' axe.; Was not like a mantis wielding an axe.

Past/Perfective
Negative
Polite
Formal Register