WordNet sense 1 (incapable of compromise or flexibility):

strict

WordNet sense 2 (unwilling to tolerate difference of opinion):

intolerant

WordNet sense 3 (fixed and unmoving):

fixed, set

WordNet sense 4 (not in motion):

nonmoving, unmoving

WordNet sense 5 (incapable of adapting or changing to meet circumstances):

unbending

WordNet sense 6 (not adaptable):

unadaptable

WordNet sense 7 (incapable of or resistant to bending):

stiff

WordNet sense 8 (resistant to being bent):

inflexible