σαξίφραγον
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 (LSJ)
τό, saxifrage, = κέστρον 1.2, Gal.6.339 (gender uncertain), Ps.-Dsc.4.16; σαξίφραγος, ὁ or ἡ, Ps.-Gal.19.694; cf. σαρξίφαγον.