ἐκτελής
From LSJ
αὐτὸν κέκρουκας τὸν βατῆρα τοῦ λόγου → you have struck the very threshold of the argument, you have struck the most important and chiefmost point
English (LSJ)
ές, (τέλος)
A brought to an end, perfect, ἀγάθ' ἐκτελῆ γενέσθαι A.Pers.218; of corn, ripe, Hes.Op.466; also of persons, ἤδη πεφυκότ' ἐκτελῆ νεανίαν E.Ion780, cf. A.Ag.105 (lyr., s. v.l.). Adv. -λῶς in full, completely, BGU1116.9 (i B. C.).