κατα-χρηστικός · kata-chrēstikos — LSJ
misused, misapplied, of words and phrases, ὑπάκουσις Phld. Rh. 1.89 S., cf. S.E. M. 8.129. Adv. -κῶς by a misuse of language, Str. 7.7.11, S.E. P. 1.191, etc.; opp. κυρίως, D.T. 632.24, Phld. Po. 5.15, Ph. 1.68: Comp. -ώτερον A.D. Synt. 4.26, S.E. M. 6.2.
serviceable, τὰ κ. καὶ συνεργατικὰ πρός τι Ptol. Tetr. 80.