C2 stiff or fixed; not able to be bent or moved僵硬的;固定的;不能弯曲的
a rigid steel and concrete structure坚固的钢筋混凝土结构
I was rigid with (= stiff and unable to move because of) fear.我被吓得呆若木鸡。
not able to be changed or persuaded顽固的;不易改变的
disapproving We were disappointed that they insisted on such a rigid interpretation of the rules.他们坚持对规则进行如此呆板僵化的解释,令我们非常失望。