Originally Posted by mansio

I think that "ez-" is the article "al" or "el" assimilated to "zay" (which I don't know what it means) and "-ak" of course is "you" or "of you".
On the model of "keyf Halek" (how is your "state") it is possible that a preceding word is dropped.
It could then be short for "kayf ezzayak". I even thought that ezz could be derived from 3uzz (strength) but that wouldn't account for the "y".