Τί κοινότατον; ἐλπίς. καὶ γὰρ οἷς ἄλλο μηδέν, αὕτη πάρεστι → What is most common? Hope. For those who have nothing else, that is always there.
apparently from זָרָה; properly, a scatterer, i.e. the north wind (as dispersing clouds; only in plural): north.