めいはくじゃなかったです
明白じゃなかったです
meihakujanakattadesu

Desu Copula
na-Adjective
no-Adjective

The polite, past negative form of あからさま

1. Didn't understand.; Didn't know.

Past/Perfective
Negative
Polite
Casual Register
Usually Written in Kana