κοινωνητέον
From LSJ
ὦ δυσπάλαιστον γῆρας, ὡς μισῶ σ' ἔχων, μισῶ δ' ὅσοι χρῄζουσιν ἐκτείνειν βίον, βρωτοῖσι καὶ ποτοῖσι καὶ μαγεύμασι παρεκτρέποντες ὀχετὸν ὥστε μὴ θανεῖν: οὓς χρῆν, ἐπειδὰν μηδὲν ὠφελῶσι γῆν, θανόντας ἔρρειν κἀκποδὼν εἶναι νέοις → Old age, resistless foe, how do I loathe your presence! Them too I loathe, whoever desire to lengthen out the span of life, seeking to turn the tide of death aside by food and drink and magic spells; those whom death should take away to leave the young their place, when they no more can benefit the world
English (LSJ)
A one must share in, τινός τινι Pl.R.403b; φιλίας Ph.2.401; ὀνειδῶν Plu.Pomp.44.
Greek (Liddell-Scott)
κοινωνητέον: ῥημ. ἐπίθ., δεῖ κοινωνεῖν, τινός τινι Πλάτ. Πολ. 403Β.