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Ζῆν οὐκ ἄξιος, ὅτῳ μηδὲ εἷς ἐστι χρηστὸς φίλος → Life is not worth living if you do not have at least one friend.
jocatio jocationis N F :: joke, jest
jŏcātĭō,¹⁶ ōnis, f. (jocor), badinage, plaisanterie : Cic. Fam. 9, 16, 7 ; Att. 2, 8, 1.