Inflexibleness

in·flex·i·ble  (n-flks-bl)

adj.

1. Not easily bent; stiff or rigid.

2. Incapable of being changed; unalterable.

3. Unyielding in purpose, principle, or temper; immovable.

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in·flexi·bili·ty, in·flexi·ble·ness n.

in·flexi·bly adv.

Synonyms: inflexible, inexorable, adamant, obdurate
These adjectives mean not capable of being swayed or diverted from a course. Inflexible implies unyielding adherence to fixed principles or purposes: My boss is inflexible on many issues.
Inexorable implies lack of susceptibility to persuasion: "Cynthia was inexorableshe would have none of him" (Winston Churchill).
It also describes things that are inevitable, relentless, and often severe in effect: "Russia's final hour, it seemed, approached with inexorable certainty" (W. Bruce Lincoln).
Adamant implies imperviousness to pleas or appeals: He is adamant about leaving right now.
Obdurate implies hard, callous resistance to tender feelings: The child's misery would move even the most obdurate heart. See Also Synonyms at stiff.

Thesaurus

Noun

1.

inflexibleness - a lack of physical flexibility inflexibility rigidity, rigidness - the physical property of being stiff and resisting bending