脊椎 せきつい湾曲 わんきょくじゃなかったです
sekitsuiwankyokujanakattadesu

Noun
Desu Copula

The polite, past negative form of 脊椎湾曲

1. Wasn't curved.; Didn't have a curvature.

Past/Perfective
Negative
Polite
Casual Register