相乗 そうじょう作用 さようじゃなかったです
sōjōsayōjanakattadesu

Noun
Desu Copula
no-Adjective

The polite, past negative form of 相乗作用

1. It wasn't synergy.; It wasn't a synergistic effect.

Past/Perfective
Negative
Polite
Casual Register