Godan verb with 'su' ending, Transitive verb
to melt; to liquefy; to thaw
４．中華鍋にごま油を熱してバターを溶かす。4. Heat the sesame oil in the wok and melt the butter. to dissolve (in a liquid); to bring into solution
to lose (money; through gambling, etc.); to squander
Colloquial
Also written 融かす【とかす】、解かす【とかす】