A counterargument is an opposing viewpoint or argument presented to challenge or refute an existing argument.

Example sentence: In her persuasive essay, she presented a strong counterargument against the proposed legislation.

To counterargue is to provide or present a counterargument as a response to an existing argument.

Example sentence: He counterargued against the claim made by the opposing team during the debate.

When used as an adjective, counterargumeative describes something that is characterized by providing or involving counterarguments.

Example sentence: The article offered a counterargumeative perspective on the issue, encouraging readers to critically analyze existing theories.