Inflexible
Part of speech: adjective
Definition: Not flexible; not capable of bending or being bent; stiff; rigid; firm; unyielding. Not willing to change, e.g. one's opinion or habits; obstinate; stubborn; resolute; determined.
Example sentence: I think justices of all stripes agree that stare decisis is important, but not an inextricable command. It's not inflexible; it's not absolute.
Rigid
Part of speech: adjective
Definition: Stiff, rather than flexible.Fixed, rather than moving.Rigorous and unbending.Uncompromising.
Example sentence: I have no patience for anyone who thinks they've figured things out, no patience for people who think they're right at the expense of everyone else. The world is too connected and too complicated to conform to any of our rigid ideas of what it should be like.