Evanesce /(ĕv`ȧ*nĕs")/

Ev·a·nesce

Evanesce

v. i.

imp. & p. p. Evanesced; p. pr. & vb. n. Evanescing

  1. To vanish away; to become dissipated and disappear, like vapor.
    I believe him to have evanesced or evaporated.