rig·id 
/ˈrɪʤəd/ adjective
/ˈrɪʤəd/ adjective [more rigid; most rigid] 1 : not able to be bent easily : stiff
▪ a rigid steel beam ▪ The patient's legs were rigid. 2 : not easily changed
▪ a rigid procedure ▪ The periodical has rigid [=strict, inflexible] guidelines for submissions. ▪ a rigid [=strict, unwavering] adherence to the rules 3 : not willing to change opinions or behavior
▪ He is a rigid disciplinarian.
▪ a rigid steel beam ▪ The patient's legs were rigid.
▪ a rigid procedure ▪ The periodical has rigid [=strict, inflexible] guidelines for submissions. ▪ a rigid [=strict, unwavering] adherence to the rules
▪ He is a rigid disciplinarian.
— ri·gid·i·ty /rəˈʤɪdəti/ noun [noncount]
▪ the rigidity of the plant's stem ▪ the rigidity of the guidelines
/rəˈʤɪdəti/ noun [noncount] ▪ the rigidity of the plant's stem ▪ the rigidity of the guidelines
— rig·id·ly adverb
▪ The law was rigidly enforced. ▪ The soldiers stood rigidly at attention.
▪ The law was rigidly enforced. ▪ The soldiers stood rigidly at attention.
