S: (n) repudiation, renunciation (rejecting or disowning or disclaiming as invalid) "Congressional repudiation of the treaty that the President had negotiated"
S: (n) rebuff, snub, repulse (an instance of driving away or warding off)
S: (v) act, move (perform an action, or work out or perform (an action)) "think before you act"; "We must move quickly"; "The governor should act on the new energy bill"; "The nanny acted quickly by grabbing the toddler and covering him with a wet towel"