oppugn

verb (used with object)

1. to assail by criticism, argument, or action.
2. to call in question; dispute.

verb

1. (tr) to call into question; dispute

v.mid-15c., from Latin oppugnare “to fight against, attack, assail,” from ob- “toward, against” (see ob-) + pugnare “to fight” (see pugnacious). Related: Oppugned; oppugning.