אָז
From LSJ
Ζῆν οὐκ ἄξιος, ὅτῳ μηδὲ εἷς ἐστι χρηστὸς φίλος → Life is not worth living if you do not have at least one friend.
English (Strong)
a demonstrative adverb; at that time or place; also as a conjunction, therefore: beginning, for, from, hitherto, now, of old, once, since, then, at which time, yet.
