inflexible

 
Pronunciation: /ɪnˈflɛksɪb(ə)l/

adjective

  • 1unwilling to change or compromise: once she had made up her mind, she was inflexible
  • not able to be changed or adapted to particular circumstances: inflexible rules
  • 2not able to be bent; stiff: heavy inflexible armour

Derivatives

inflexibility

Pronunciation: /-ˈbɪlɪti/
noun

inflexibly

adverb

Origin:

late Middle English: from Latin inflexibilis, from in- 'not' + flexibilis 'flexible'