inflexible

Not easily bent; stiff or rigid. cross-reference: stiff.

Incapable of being changed; unalterable.

Refusing to change one’s attitude, purpose, or principles; immovable.

Not flexible; incapable of bending or of being bent; rigid: as, an inflexible rod.

Unyielding in temper or purpose; that will not yield to prayers or arguments; firm in purpose; incapable of being turned; not to be prevailed on.

Not to be changed or altered; unalterable; not permitting variation.

Synonyms Rigid, stiff.

Inexorable, inflexible, resolute, steadfast, unbending, unyielding, immovable, unrelenting; obstinate, stubborn, dogged.

Not capable of being bent; stiff; rigid; firm; unyielding.

Firm in will or purpose; not to be turned, changed, or altered; resolute; determined; unyieding; inexorable; stubborn.