ἄστοχος
From LSJ
ὃν οὐ τύπτει λόγος οὐδὲ ῥάβδος → if words don't get through, neither a beating will | if the carrot doesn't work, the stick will not work either | whom words do not strike, neither does the rod
English (LSJ)
ον,
A missing the mark, aiming badly at, τινός Pl.Ti.19e, AP9.370 (Tib. Ill.). 2 abs., aiming amiss, random, οὐκ ἀστόχου διανοίας Arist.HA587a9; κατηγορία aimless, absurd, Plb.5.49.4; of a person, Phld.Ind.Sto.32. Adv. -χως amiss, Alex.116.14, Plb.1.74.2, Phld.Mort.33.
