μονομερής
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)
ές, (μέρος)
A consisting of one part, single, opp. πολυμερής, φιλοσοφία S.E.M.7.2. 2 for one side, of a bandage, Gal.18 (1).794. II ἐκ τοῦ μ. after hearing only one side, Luc.Cal.6; τὰ μ. ex parte applications, Lyd.Mag.3.15; μ. μαρτυρίαι Just.Nov.90.9. Adv. -μερῶς in a one-sided manner, Vett.Val.136.2.