"a se însera"
Translation:to get dark
Imagine that: one person says : "Buna ziua", the other person says "A se insera". Think again! It makes no sense!
OK, it's not a sentence, it's an isolated infinitive. People do not talk a lot in isolated infinitives but language courses use them. And you could use this one as an answer to "ce este contrariul de a se lumina?" :-)