Liddell-Scott-Jones

συμπεραίνω (sumperainō) to finish off together ^G:V

συμπεραίνω,

accomplish jointly, τι [Refs 5th c.BC+] — middle, συμπεραναμένων τῶν.. συνεργῶν αὐτῷ τὴν πρὸς Θηβαίους ἔχθραν had effectually helped him to create the ill-feeling, [Refs 4th c.BC+]:—passive, to be accomplished simultaneously, τὰ συμπερανθέντα τάχη [Refs 5th c.BC+]

__2 finish, work out, ἐπειδὰν συμπεράνωμεν (-αίνωμεν codices) τὸν.. λόγον [Refs 2nd c.AD+] —passive [Refs]
__II decide or conclude absolutely, ξ. φροντίδα make up one's mind, [Refs 5th c.BC+]; κλῇθρα μοχλοῖς make the doors doubly sure by bars, [Refs 5th c.BC+]; ὁ συμπεραίνων (i.e. ἀριθμός) the last counted, in a series, [Refs 4th c.BC+]:—passive, to be quite finished, [Refs 5th c.BC+]
__II.2 in Logic, middle συμπεραίνεσθαι conclude syllogistically, draw conclusions, [Refs 4th c.BC+]:—passive, to be so concluded, [Refs]; τὸ συμπερανθέν the conclusion drawn, [Refs]
__III intransitive in active, extend equally far, [Refs]