rethink

Noun	1.	rethink - thinking again about a choice previously made; "he had second thoughts about his purchase" Synonyms: afterthought, second thought, reconsideration
Verb	1.	rethink - change one's mind; "He rethought his decision to take a vacation"

about-face, afterthought, backpedal, believe, conceive, consider, reconsideration, second thought, think