stiffen
US
UK stiffen vi: (substance: become hard)
SC 变硬 biàn yìng
SC 发硬 biàn yìng，fā yìng
SC 变挺 biàn yìng，biàn tǐng
Beat the egg whites till they stiffen.
stiffen vi: (person: become physically tense) (人，因为紧张等)
SC 变得僵硬，绷紧 biàn dé jiāng yìng，bēng jǐn
She stiffened when I mentioned her old boss.
stiffen [sth] vtr: (make stiff) (面料等)
SC 变硬 biàn yìng
You can stiffen the fabric with starch.