Merriam-Webster Collegiate Dictionary - congeal

 verb  Etymology: Middle English congelen, from Middle French congeler, from Latin congelare, from com- + gelare to freeze — more at cold  Date: 14th century  transitive verb  1. to change from a fluid to a solid state by or as if by cold  2. to make viscid or curdled ; coagulate  3. to make rigid, fixed, or immobile  intransitive verb to become ~ed ; solidify  • ~ment noun