- stiffen
- I(Roget's IV) v.1. [To grow stiff]Syn. jellify, gel, jelly, thicken, clot, coagulate, solidify, congeal, condense, set, curdle, freeze, inspissate, cake, chill, candy, crystallize; see also harden 2 .Ant. soften*, melt, liquefy.2. [To cause to become stiff]Syn. harden, benumb, anneal, starch, petrify, ossify, brace, prop, cement, fix, precipitate, evaporate, strengthen, invigorate, revive, bring to, inflate.Ant. relax*, moisten, limber.II(Roget's 3 Superthesaurus) v.harden, firm, firm up, tighten, thicken, congeal, set, gel.ANT.: loosen, soften, liquefyIII(Roget's Thesaurus II) verb 1. To make stiff or stiffer: starch. See FLEXIBLE. 2. To make or become tense: tauten, tense, tighten. See TIGHTEN.
English dictionary for students. 2013.