inflexible vs muscle-bound

inflexible and muscle-bound both are adjectives.

Word	Noun	Adjective	Verb	Adverb
inflexible	No	Yes	No	No
muscle-bound	No	Yes	No	No

inflexible (adjective)	muscle-bound (adjective)
resistant to being bent	having stiff muscles as the result of excessive exercise
incapable of change
not making concessions
incapable of adapting or changing to meet circumstances