evaporate

verb
1
if a liquid evaporates or if something evaporates it, it changes into a gas, especially steam
تبخیر شدن, بخار شدن, به صورت بخار در آمدن
2
to disappear, especially by gradually becoming less and less
از بین رفتن, محو شدن, ناپدید شدن
Her confidence had now completely evaporated.
Their lead in the opinion polls evaporated overnight.