διᾱκον-ικός · diakon-ikos — LSJ
serviceable, Ar. Pl. 1170, etc.; -κή (sc. τέχνη), ἡ, Pl. Plt. 299d; δ. φύσις Id. ap. Plu. Def.orac. 2.416f: Comp. -ώτερος Id. Grg. 517b; αἱ δ. πράξεις, τὰ δ. ἔργα servants’ business, menial work, Arist. Pol. 1277a36, 1333a7; δ. ἀρεταί ib. 1259b23. Adv. -κῶς in the course of service, Men. 113; serviceably, Sor. 1.80.