Question the validity of

• Controvert
• Attack dog's neuter after surgery
• Call into question
• Question the truth of

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
mid-15c., from Latin oppugnare "to fight against, attack, assail," from ob- "toward, against" (see ob- ) + pugnare "to fight" (see pugnacious ). Related: Oppugned ; oppugning .

Wiktionary Word definitions in Wiktionary
vb. (context transitive rare English) To contradict or controvert; to oppose; to challenge or question the truth or validity of a given statement.

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Oppugn \Op*pugn"\, v. t. [imp. & p. p. Oppugned ; p. pr. & vb. n. Oppugning .] [OF. oppugner, L. oppugnare; ob (see Ob- ) + pugnare to fight. See Impugn .] To fight against; to attack; to be in conflict with; to oppose; to resist. They said the manner of ...

WordNet Word definitions in WordNet
v. challenge the accuracy, probity, or propriety of; "We must question your judgment in this matter" [syn: question , call into question ]