argue

Concise Oxford English Dictionary © 2008 Oxford University Press:
argue/ˈɑːɡjuː/

▶verb (argues, arguing, argued)

• 1 exchange conflicting views in a heated way.

• 2 give reasons or cite evidence in support of an idea, action, or theory: sociologists argue that inequalities are being reduced.

– phrases
argue the toss informal, chiefly Brit. dispute a decision already made.

– derivatives
arguer noun.

– origin ME: from OFr. arguer, from L. argutari ‘prattle’, frequentative of arguere ‘make clear, prove, accuse’.