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.