συνάρτησις
From LSJ
ἔγνω δὲ φώρ τε φῶρα καὶ λύκος λύκον → the thief knows the thief and the wolf knows the wolf, and thief knows thief and wolf his fellow wolf, set a thief to catch a thief
English (LSJ)
εως, ἡ,
A junction, union, τῶν φλεβῶν καὶ νεύρων Arist.Pr.883b22; joint of machine, Ph.Bel.91.8; combination of words, A.D.Synt.17.8. II connexion, cohesion of premisses with one another and with the conclusion in a syllogism, Stoic.2.79; of the clauses in a conditional sentence, Plu. 2.387a, S.E.P.2.111.