stiffness
noun [ U ] uk/ˈstɪf.nəs/ us/ˈstɪf.nəs/
(NOT RELAXED)
生硬，拘谨
the quality of being very formal and not relaxed
Her initial stiffness began to wear off as we got to know her. 随着我们渐渐了解她，她起初的拘谨也慢慢消失了。
(FIRM)
C2 劲度；刚硬
the quality of being firm, hard, or unable to bend
the stiffness of her muscles 她肌肉的结实程度
(SEVERE)
严重；艰难
the quality of being very severe, strong, or difficult
Everyone was surprised at the stiffness of the sentence/punishment/penalty/sanctions. 每个人都对判决／惩罚／处罚／制裁之重感到吃惊。