repugn (v.)

late 14c., repugnen, "rebel, disobey, oppose (God); resist or fight against, express disagreement," from Old French repugner, from Latin repugnare "fight against, resist," from re- "back, against" (see re-) + pugnare "to fight" (from PIE root *peuk- "to prick"). Related: Repugned; repugning.