firm

firm up

verb

Definition of FIRM

to become physically firm or solid <wait for the modeling clay to firm up before handling the finished pot>

Synonyms concrete, congeal, firm (up), freeze, indurate, set, solidify

Related 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, temper

Near Antonyms deliquesce, dissolve, flux, fuse, melt, smelt, thaw, unfreeze

Antonyms liquefy (also liquify), soften