Synonyms for thaw

verb

1. To melt

   dissolve, liquefy, flow, run, deliquesce, liquate, fuse, become liquid; see also dissolve 1, melt 1.

   Antonyms freeze*, congeal, refrigerate.

2. To unbend

   open up, loosen, become soft, relent, relax, mollify, grow genial; see also soften 1.

   Antonyms stiffen*, harden, grow cool. See syn. study at melt.melt.