Origin of oppugnMiddle English oppugnen from Classical Latin oppugnare from ob- (see ob-) + pugnare from pugna, a fight: see pugnacious
transitive verbop·pugned, op·pugn·ing, op·pugns
Origin of oppugnMiddle English oppugnen from Latin oppugnāre to attack ob- against ; see ob- . pugnāre to fight with the fist ; see peuk- in Indo-European roots.
(third-person singular simple present oppugns, present participle oppugning, simple past and past participle oppugned)