προστακτικός
From LSJ
νόσημα γὰρ αἴσχιστον εἶναί φημι συνθέτους λόγους → for I consider false words to be the foulest sickness
English (LSJ)
ή, όν,
A of or for commanding, imperative, imperious, τὸ π. [ἡ ψυχή], opp. τὸ ὑπηρετικόν (of the body), Arist.Top.128b19; π. τινῶν Corn.ND16; λόγος Plu.2.1037f; Προστακτικός (sc. λόγος), title of work by Protagoras, D.L.9.55; βραχυλογία Plu.Phoc.5; also of persons, ἄρχων Max.Tyr.13.2 (Sup.). II Gramm., ἡ -κὴ ἔγκλισις the imperative mood, D.T.638.7, A.D.Synt.31.20; π. ἐκφορὰ τῶν ῥημάτων ib.69.20; τὸ π. σχῆμα Anon.Fig.24; also τὸ -κόν D.L. 7.66,67, Ps.-Plu.Vit.Hom.53. Adv. -κῶς in the imperative mood, D.H.4.18, Sch.Ar.Av.1163.