効果 こうか抜群 ばつぐんじゃありませんでした
kōkabatsugunjārimasendeshita

Noun
Desu Copula
na-Adjective
no-Adjective

The polite, past negative form of 効果抜群

1. Wasn't effective.; Didn't work well.

Past/Perfective
Negative
Polite
Terminal Form