difficulty in moving because of pain in your muscles pain and stiffness in her legs 她两腿又疼又僵的感觉
the fact of not being friendly or relaxed 不友好的；生硬的 his military stiffness and reserve 他的军事力量和储备
the fact of being hard and difficult to bend or move 不易弯曲（或活动）的；硬的；挺的 It's difficult to sew because of the stiffness of the fabric. 由于织物的刚度，很难缝制。
the fact of being more difficult or severe than usual 困难的；艰难的；严厉的；激烈的 the stiffness of the competition 比赛的激烈程度