ἄπλαστος
συνερκτικός γάρ ἐστι καὶ περαντικός, καὶ γνωμοτυπικὸς καὶ σαφὴς καὶ κρουστικός, καταληπτικός τ' ἄριστα τοῦ θορυβητικοῦ → he's intimidative, penetrative, aphoristically originative, clear and aggressive, and superlatively terminative of the obstreperative
English (LSJ)
ον,
A not capable of being moulded, Arist.Mete.385a15. 2 not moulded: hence, natural, unaffected, φρόνημα, εὔνοια, προθυμία, ἦθος, etc., Plu.Aem.37, Vit.Philonid.p.10 C., Them.Or.4.56d, etc.; of persons, LXX Ge.25.27, Ceb.20. Adv. -τως naturally, without disguise, γελᾶν Pl.Ep.319b codd.; αὐλεῖν Thphr.HP4.11.4; λέγειν D.H. Rh.10.11; ἀποκρίνεσθαι Ael.VH9.27. 3 not feigned: hence, true, opp. mythical, Plu.2.16c,62c. 4 not fully shapen, unformed, Ph. 2.317. II v.l. for ἄπλᾱτος (q.v.).