The Collaborative International Dictionary
Oppugned
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 their impeachment they could
not but conceive did oppugn the rights of Parliament.
--Clarendon.
Wiktionary
oppugned
vb. (en-past of: oppugn)