1. Inébranlable.
2. Rigoureux.
Not capable of being swayed or diverted from a course; unsusceptible to persuasion; SYN. adamantine, inexorable, intransigent.
Impenetrable; immovable.
ETYM Latin inflexiblis: cf. French inflexible. Related to In- not, and Flexible.
1. Unbending; rigid, so as to resist change.
2. Incapable of adapting or changing to meet circumstances; SYN. rigid, unbending.
3. Extended meanings; incapable of change.
ETYM Pref. un- not + bending; properly p. pr. unbend.
1. Not bending; not yielding to pressure; stiff; - applied to material things.
2. Unyielding in will; not subject to persuasion or influence; inflexible; resolute; - applied to people.
3. Unyielding in nature; unchangeable; fixed; - applied to abstract ideas.