stiffen的现在完成时为：stiffened...

vt.& vi.（使）变硬，（使）强硬，使绷紧，使猛烈，使粘稠...

stiffen的现在进行时为：stiffening...

The blood supply to the skin is reduced when muscles stiffen.当肌肉变得僵硬时，皮肤的供血量就减少了。I must stiffen Dreamer's back.我一定要给德里麦打气.These clothes restrict your freedom of movement and stiffen up the whole body.这些衣服使你行动不便，让全身都...

stiffen的音标：stiffen的英式发音音标为：['stɪfn]stiffen的美式发音音标为：['stɪfən]...

He tried to stiffen his wavering soldiers.他企图使动摇的士兵坚强起来.These clothes restrict your freedom of movement and stiffen up the whole body.这些衣服使你行动不便，让全身都变得不灵活。I felt my body involuntarily stiffen against her invasion of my p...

stiffen的第三人称单数（三单）为：stiffens...

stiffen的一般过去时为：stiffened...