变卦 /biànguà/ angolul

change one's mind▼(to decide differently than one had decided before)
verb
[UK: tʃeɪndʒ wʌnz maɪnd] [US: ˈtʃeɪndʒ wʌnz ˈmaɪnd]

volte-face▼(reversal of attitude, policy, or principle)
noun
[UK: ˌvɒlt ˈfɑːs] [US: ˌvɒlt ˈfæs]