/ˈrɪdʒɪd/
very strict and difficult to change 死板的；僵硬的 SYN inflexible
stiff or fixed; not able to be bent or moved:
a rigid steel and concrete structure
I was rigid with (= stiff and unable to move because of) fear
The curriculum was too narrow and too rigid.
课程设置过于狭窄和死板。
His rigid adherence to the rules made him unpopular.
他对规则的刻板坚持使得他不受欢迎。