συνημοσύνη
From LSJ
μηδέν' ὀλβίζειν, πρὶν ἂν τέρμα τοῦ βίου περάσῃ μηδὲν ἀλγεινὸν παθών → Count no man blessed 'til he's passed the endpoint of his life without grievous suffering. (Sophocles, King Oedipus 1529f.)
English (LSJ)
ἡ, in pl.,
A agreements, covenants, Il.22.261. II ties of friendship or relationship, A.R.1.300, 3.1105: sg., Thgn.284, as v.l. for φιλημοσύνῃ.