congeal

1 to become physically firm or solid <the surface of the pond congealed after several days of frigid temperatures> Synonyms concrete, harden, firm (up), freeze, indurate, set, solidifyRelated Words cake, callus, encrust (also incrust); clot, coagulate, gel, gelate, gelatinize, jell, jelly, stiffen, thicken; calcify, crystallize (also crystalize), ossify, petrify, rigidify; anneal, case-harden, temperNear Antonyms deliquesce, dissolve, flux, fuse, melt, smelt, thaw, unfreezeAntonyms liquefy (also liquify), soften

2 to turn from a liquid into a substance resembling jelly <the gravy had already started to congeal by the time the waiter served our dinners> Synonyms clot, coagulate, gel, gelate, gelatinize, jell, jelly, setRelated Words cake, concrete, firm (up), fix, freeze, harden, indurate, solidify, stiffen; condense, thicken; clump, curd, curdle, gum, lump (up)Near Antonyms deliquesce, flux, fuse, liquefy (also liquify), melt, thaw