[im.pugn] vt [ME, to assail, fr. MF impugner, fr. L inpugnare, fr. in- + pugnare to fight--more at pungent] (14c) 1: to assail by words or arguments: oppose or attack as false or lacking integrity
2. obs a: assail b: resist -- im.pugn.able adj -- im.pugn.er n