[ in-flek-suh-buhl ]
See synonyms for: inflexibleinflexibilityinflexiblenessinflexibly on

  1. not flexible; incapable of or resistant to being bent; rigid: an inflexible steel rod.

  2. of a rigid or unyielding temper, purpose, will, etc.; immovable: an inflexible determination.

  1. not permitting change or variation; unalterable: inflexible rules.

Origin of inflexible

1350–1400; Middle English, from Latin inflexibilis “rigid, unbending.” See in-3, flexible

synonym study For inflexible

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.

Other words for inflexible

Opposites for inflexible

Other words from inflexible

  • in·flex·i·bil·i·ty, in·flex·i·ble·ness, noun
  • in·flex·i·bly, adverb Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use inflexible in a sentence

British Dictionary definitions for inflexible


/ (ɪnˈflɛksəbəl) /

  1. not flexible; rigid; stiff

  2. obstinate; unyielding

  1. without variation; unalterable; fixed

Origin of inflexible

C14: from Latin inflexībilis; see inflect

Derived forms of inflexible

  • inflexibility or inflexibleness, noun
  • inflexibly, adverb

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