Definition of: inflexible

(in·flek′sə·bəl) adjective
1. Not to be turned from a purpose; unyielding; firm; inexorable: inflexible resolves, an inflexible will.
2. Incapable of being physically bent; unbending; rigid; not flexible.
3. That cannot be altered or varied: the inflexible laws of nature. [<L inflexibilis]
—in·flex′i·bil′i·ty, in·flex′i·ble·ness noun
—in·flex′i·bly adverb Synonyms: immovable, inexorable, obstinate, persistent, pertinacious, resolute, rigid, steadfast, stiff, stubborn, unbending, unrelenting, unyielding. See OBSTINATE. Antonyms: ductile, elastic, flexible, indulgent, lithe, pliable, pliant, supple, yielding.