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inflexible

[ in-flek-suh-buhl ]
/ ɪnˈflɛk sə bəl /
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See synonyms for: inflexible / inflexibility / inflexibleness / inflexibly on Thesaurus.com

adjective

not flexible; incapable of or resistant to being bent; rigid: an inflexible steel rod.
of a rigid or unyielding temper, purpose, will, etc.; immovable:an inflexible determination.
not permitting change or variation; unalterable: inflexible rules.

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Origin of inflexible

1350–1400; Middle English, from Latin inflexibilis “rigid, unbending.” See in-3, flexible
2. Inflexible, relentless, implacable, inexorable imply having the quality of not being turned from a purpose. Inflexible means unbending, adhering undeviatingly to a set plan, purpose, or the like: inflexible in interpretation of rules; an inflexible will. Relentless suggests so pitiless and unremitting a pursuit of purpose as to convey a sense of inevitableness: as relentless as the passing of time. Implacable means incapable of being placated or appeased: implacable in wrath. Inexorable means unmoved by prayer or entreaty: inexorable in demanding payment.
in·flex·i·bil·i·ty, in·flex·i·ble·ness, nounin·flex·i·bly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

British Dictionary definitions for inflexible

inflexible
/ (ɪnˈflɛksəbəl) /

adjective

not flexible; rigid; stiff
obstinate; unyielding
without variation; unalterable; fixed
inflexibility or inflexibleness, nouninflexibly, adverb
C14: from Latin inflexībilis; see inflect
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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