This is the 2449th most frequent Polish word.
c
The Polish word "c" is a conjunction meaning "what" or "that" in colloquial or informal usage, often used in place of "co" or "że".
'się' - reflects the reflexive particle used with the verb 'spotkać' in this sentence.
Spotkałam się z Anią na rynku.
I met with Ania at the marketplace.
'czy' - used to introduce a yes-no question here.
Czy przyjdziesz na spotkanie dziś wieczorem?
Will you come to the meeting tonight?
'Czekam' - expresses the first-person singular verb form of 'czekać'.