ἐπιτακτικός

ή, όν, Adv.
A. commanding, authoritative, Arist. EN 1143a8 ; ἡ ἐ. τέχνη the art or faculty of command, Pl. Plt. 260csq.; so τὸ ἐ. μέρος ib.b. Adv. ‐κῶς D.S. 15.40.
Liddell, Scott & Jones
A Greek-English Lexicon, 1940
An open-access project