This is the 3086th most frequent Turkish word.
bilin
"Bilin" means "be known" or "know" (imperative form) in English.
Here, 'bilinsin' is the imperative form of the passive voice of 'bilmek', meaning 'to know'. It suggests something should be known by the subjects.
Herkes tarafından bilinsin ki, olanları yanlış anlamayın.
Let it be known by everyone that you should not misunderstand what happened.
In this sentence, 'bilin' is the imperative form of 'bilmek' directed towards a plural audience or formal singular audience, meaning 'to know' or 'be aware'.
Bu tavsiyeyi uyguladığınızda başarıya ulaşacağınızı bilin.
Know that applying this advice will lead you to success.
'Bilin' here again is the imperative form of 'bilmek', used to directly instruct or inform the audience to be aware of the given information.