συνήκω
From LSJ
τὸ τῆς πάλαι ποτε φύσεως ξύντροφον → the congenital property of nature
English (LSJ)
A to have come together, be assembled, meet, Th.5.87. II σ. εἰς ἕν, of walls, meet in a point, X.Vect.4.44; σ. εἰς στενόν to narrow down, Arist.IA710b2; so εἰς ὀξύ Id.HA495b10, Thphr.HP 3.11.1.