inflexible vs semirigid

inflexible and semirigid both are adjectives.

Word	Noun	Adjective	Verb	Adverb
inflexible	No	Yes	No	No
semirigid	No	Yes	No	No

inflexible (adjective)	semirigid (adjective)
resistant to being bent	not fully rigid
incapable of change	having a form maintained by a rigid internal structure as well as by internal gas pressure
not making concessions
incapable of adapting or changing to meet circumstances