This is the 81st most frequent Hungarian word.
mivel
"Since," "because," or "with what/with which," depending on context.
Here, 'mivel' is used as a conjunction introducing a causal clause, meaning 'because'.
Nem tudok elmenni a koncertre, mivel dolgoznom kell.
I cannot go to the concert because I have to work.
Here, 'mivel' is an interrogative adverb, meaning 'with what'.
Mivel magyarázható ez a különös viselkedés?
With what can this strange behavior be explained?
Here, 'mivel' is used in a question to mean 'what (instrument or activity).'