controvert
131demonstrate — I (establish) verb authenticate, circumstantiate, clarify, confirm, corroborate, display, elucidate, evince, exemplify, exhibit, illuminate, illustrate, indicate, instruct, lay out, make clear, make evident, make plain, manifest, perform, point… …
132repudiate — re·pu·di·ate /ri pyü dē ˌāt/ vt at·ed, at·ing: to disavow or reject an obligation (as a debt) or duty (as performance under a contract); specif: to indicate an inability or unwillingness to perform as promised under (a contract) re·pu·di·a·tor /… …
