μερίτης
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)
ου, ὁ, (μερίς)
A partaker, sharer, τῆς ὠφελείας D.32.25, cf.Plb.4.29.6, Them.Or.5.71b, al.; τινί τινος with one in a thing, Plb.13.8.2: in pl., joint-owners, IG2.1058.