Ev·a·nesce v. i. [imp. & p. p. Evanesced p. pr. & vb. n. Evanescing. ] To vanish away; to become dissipated and disappear, like vapor.
I believe him to have evanesced or evaporated. --De Quincey.
v : disappear gradually; "The pain eventually passed off" [syn:
fade, blow over, pass off, fleet, pass]