To change from a liquid to a vapor

To disappear gradually

धीरे-धीरे गायब होना

English Usage: Her hopes of winning the contest evaporated after the first round.

Hindi Usage: पहले राउंड के बाद प्रतियोगिता जीतने की उसकी उम्मीद धीरे-धीरे गायब हो गई।