Is it ensure, insure, or assure?
evaporate e·vap·o·rate (ĭ-vāp'ə-rāt')
v. e·vap·o·rat·ed, e·vap·o·rat·ing, e·vap·o·rates
To convert or change into a vapor; volatilize.
To produce vapor.
To draw or pass off in the form of vapor.
To draw moisture away from, as by heating, leaving only the dry solid portion.
To deposit a metal on a substrate by vacuum sublimation.