Source : Webster's Revised Unabridged Dictionary (1913)

Thaw \Thaw\, v. i. [imp. & p. p. {Thawed}; p. pr. & vb. n.
   {Thawing}.] [AS. [thorn][=a]wian, [thorn][=a]wan; akin to D.
   dovijen, G. tauen, thauen (cf. also verdauen 8digest, OHG.
   douwen, firdouwen), Icel. [thorn]eyja, Sw. t["o]a, Dan.
   t["o]e, and perhaps to Gr. ? to melt. [root]56.]
   1. To melt, dissolve, or become fluid; to soften; -- said of
      that which is frozen; as, the ice thaws.

   2. To become so warm as to melt ice and snow; -- said in
      reference to the weather, and used impersonally.

   3. Fig.: To grow gentle or genial.

Source : WordNet®

thawed
     adj 1: no longer frozen solid; "the thawed ice was treacheous"
     2: no longer frozen; "the thawed ground was muddy"