συμμονή
From LSJ
ψυχῆς πείρατα ἰὼν οὐκ ἂν ἐξεύροιο πᾶσαν ἐπιπορευόμενος ὁδόν· οὕτω βαθὺν λόγον ἔχει → one would never discover the limits of soul, should one traverse every road—so deep a measure does it possess
English (LSJ)
ἡ,
A holding together, coherence, permanence, [τοῦ κόσμου] Chrysipp.Stoic.2.173; [αἱ ψυχαὶ] τῷ σώματι συμμονῆς ἦσαν αἴτιαι ib. 321; holding together of the divine order, M.Ant.5.8; σ. τῶν σπερμάτων preservation, Dsc.Prooem.9; living together, Muson.Fr.13A p.68H.; in Gramm., close connexion, τῶν πτώσεων A.D.Adv.202.5.