συνηδύνω
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)
A sweeten or make pleasant to the taste, τὸν ἄρτον Plu.2.668f; -ηδυσμένη τροφή ib.661b, cf. Herod.Med. ap. Orib.Syn.6.32 (v.l. συνοδευέσθω), Paul.Aeg.2.41. 2 generally, help in cheering, Arist.EN1126b30.
