pre-noun adjectival
proper; decent; respectable; good
Used before a noun to describe something that is proper, decent, or of acceptable quality. Often implies meeting a certain standard or being the real thing, as opposed to something shoddy or makeshift.
ちゃんとしたレストランで食事したい。
I want to eat at a proper restaurant.
彼はちゃんとした仕事に就いた。
He got a decent job.
ちゃんとした理由がないと休めない。
You can't take a day off without a good reason.