inflexible

US /ɪnˈflek.sə.bəl/
UK /ɪnˈflek.sə.bəl/
"inflexible" picture
1.

unwilling to change or compromise

:
The company's policy is inflexible on refunds.
He has an inflexible attitude towards new ideas.
2.

not capable of being bent without breaking

:
The old plastic became inflexible and brittle with age.
The metal rod was completely inflexible.