ἀκέντριστος
From LSJ
αὐτὸν κέκρουκας τὸν βατῆρα τοῦ λόγου → you have struck the very threshold of the argument, you have struck the most important and chiefmost point
English (LSJ)
ον, = foreg. 1, Hsch., EM432.11. -ρος, ον,
A stingless, κηφῆνες Pl.R.552c, 564b; without spur, of a cock, Clyt.1; without thorns, βάτος Ph.2.91. 2 not responding to the spur, of horses, Hippiatr.105: metaph., of style, pointless, Longin.21.2. II not occupying a cardinal point, Man. 5.108, Vett. Val.89.30.
Greek (Liddell-Scott)
ἀκέντριστος: -ον, = ἀκέντητος, Σουΐδ.