The word صار is one of the most important words to understand in Levantine Arabic because it is used all the time. It's used in all the Levant countries, Jordan, Lebanon, Syria, and Palestine, but least used in Jordan. The word is used to mean "to happen" and also has to do with time in some sentences. The example sentences should clear up the word for you. You will also hear the form of this word صاير (saayir) for example in the sentence شو صاير which means the same thing as شو عم بيصير. It's present tense.
1. شو عم بيصير = What's going on?
2. رح كون جمبك شو ما صار = I will be by your side no matter what happens.
3. قدي صارلك بلبنان؟ = How long have you been in Lebanon?
4. صارلك شهرين غايب عني = You've been away from me for 2 months.