Not changing shape or bending

• unyielding

  1. Not giving way to pressure; hard or inflexible:
  2. Incapable of being changed; unalterable:
  3. Not willing to change or be persuaded; resolute:

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  1. Not giving way to pressure; hard or inflexible:
  2. Incapable of being changed; unalterable:
  3. Not willing to change or be persuaded; resolute:

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• unbending

  1. Not yielding; inflexible:
  2. Aloof and often antisocial; extremely reserved:

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  1. Not yielding; inflexible:
  2. Aloof and often antisocial; extremely reserved:

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• stiff

  1. Difficult to bend or fold:
  2. Not moving or operating easily or freely; resistant:
  3. Lacking ease or comfort of movement; not limber:

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  1. Difficult to bend or fold:
  2. Not moving or operating easily or freely; resistant:
  3. Lacking ease or comfort of movement; not limber:

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• rigid

  1. Not flexible or pliant; stiff:
  2. Not moving or flexing:
  3. Not changing or adjusting to different conditions or problems:

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  1. Not flexible or pliant; stiff:
  2. Not moving or flexing:
  3. Not changing or adjusting to different conditions or problems:

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• inelastic

  1. Lacking elasticity; unyielding or unadaptable.
  2. Of, relating to, or being a good for which changes in price have little effect on the quantity demanded or supplied:

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  1. Lacking elasticity; unyielding or unadaptable.
  2. Of, relating to, or being a good for which changes in price have little effect on the quantity demanded or supplied:

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Incapable of changing or being modified

• unchangeable

  1. Not to be altered; immutable:

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  1. Not to be altered; immutable:

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• unalterable

  1. Impossible to alter:

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  1. Impossible to alter:

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• rigid

  1. Not flexible or pliant; stiff:
  2. Not moving or flexing:
  3. Not changing or adjusting to different conditions or problems:

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  1. Not flexible or pliant; stiff:
  2. Not moving or flexing:
  3. Not changing or adjusting to different conditions or problems:

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• ironclad

  1. Sheathed with iron plates for protection.
  2. Rigid; fixed:
  3. A 19th-century warship having sides armored with metal plates.

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  1. Sheathed with iron plates for protection.
  2. Rigid; fixed:
  3. A 19th-century warship having sides armored with metal plates.

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• invariable

  1. Not changing or subject to change; constant.

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  1. Not changing or subject to change; constant.

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• inalterable

  1. Impossible to alter; unchangeable:

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  1. Impossible to alter; unchangeable:

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• immutable

  1. Not subject or susceptible to change.

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  1. Not subject or susceptible to change.

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Firmly, often unreasonably immovable in purpose or will

• unyielding

  1. Not giving way to pressure; hard or inflexible:
  2. Incapable of being changed; unalterable:
  3. Not willing to change or be persuaded; resolute:

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  1. Not giving way to pressure; hard or inflexible:
  2. Incapable of being changed; unalterable:
  3. Not willing to change or be persuaded; resolute:

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• unrelenting

  1. Having or exhibiting uncompromising determination; unyielding:
  2. Not diminishing in intensity, pace, or effort:

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  1. Having or exhibiting uncompromising determination; unyielding:
  2. Not diminishing in intensity, pace, or effort:

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• uncompromising

  1. Unwilling to grant concessions or negotiate; inflexible:

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  1. Unwilling to grant concessions or negotiate; inflexible:

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• uncompliant

  1. (archaic) incompliant

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  1. (archaic) incompliant

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• unbending

  1. Not yielding; inflexible:
  2. Aloof and often antisocial; extremely reserved:

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  1. Not yielding; inflexible:
  2. Aloof and often antisocial; extremely reserved:

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• unbendable

  1. not bendable

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  1. not bendable

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• stubborn

  1. Refusing to change one's mind or course of action despite pressure to do so; unyielding or resolute.
  2. Characterized by a refusal to change one's mind or course of action; dogged or persistent:
  3. Difficult to treat or deal with; resistant to treatment or effort:

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  1. Refusing to change one's mind or course of action despite pressure to do so; unyielding or resolute.
  2. Characterized by a refusal to change one's mind or course of action; dogged or persistent:
  3. Difficult to treat or deal with; resistant to treatment or effort:

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• rigid

  1. Not flexible or pliant; stiff:
  2. Not moving or flexing:
  3. Not changing or adjusting to different conditions or problems:

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  1. Not flexible or pliant; stiff:
  2. Not moving or flexing:
  3. Not changing or adjusting to different conditions or problems:

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• remorseless

  1. Having no pity or compassion; merciless.
  2. Unyielding; relentless.

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  1. Having no pity or compassion; merciless.
  2. Unyielding; relentless.

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• relentless

  1. Unyielding in severity or strictness; unrelenting:
  2. Steady and persistent; unremitting:

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  1. Unyielding in severity or strictness; unrelenting:
  2. Steady and persistent; unremitting:

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• obdurate

  1. Not changing in response to argument or other influence; obstinate or intractable:
  2. Hardened in wrongdoing or wickedness; stubbornly impenitent:
  3. Hardened against feeling; hardhearted:

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  1. Not changing in response to argument or other influence; obstinate or intractable:
  2. Hardened in wrongdoing or wickedness; stubbornly impenitent:
  3. Hardened against feeling; hardhearted:

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• iron

  1. A silvery-white, lustrous, malleable, ductile, magnetic or magnetizable, metallic element occurring abundantly in combined forms, notably in hematite, limonite, magnetite, and taconite, and used alloyed in a wide range of important structural materials. Atomic number 26; atomic weight 55.845; melting point 1,538°C; boiling point 2,861°C; specific gravity 7.874 (at 20°C); valence 2, 3, 4, 6.
  2. An implement made of iron alloy or similar metal, especially a bar heated for use in branding, curling hair, or cauterizing.
  3. Great hardness or strength; firmness:

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  1. A silvery-white, lustrous, malleable, ductile, magnetic or magnetizable, metallic element occurring abundantly in combined forms, notably in hematite, limonite, magnetite, and taconite, and used alloyed in a wide range of important structural materials. Atomic number 26; atomic weight 55.845; melting point 1,538°C; boiling point 2,861°C; specific gravity 7.874 (at 20°C); valence 2, 3, 4, 6.
  2. An implement made of iron alloy or similar metal, especially a bar heated for use in branding, curling hair, or cauterizing.
  3. Great hardness or strength; firmness:

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• intransigent

  1. Refusing to moderate a position, especially an extreme position; uncompromising.

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  1. Refusing to moderate a position, especially an extreme position; uncompromising.

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• inexorable

  1. Impossible to stop, alter, or resist; inevitable:
  2. Not capable of being persuaded by entreaty; relentless:

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  1. Impossible to stop, alter, or resist; inevitable:
  2. Not capable of being persuaded by entreaty; relentless:

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• incompliant

  1. Not willing to comply.

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  1. Not willing to comply.

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• implacable

  1. Impossible to placate or appease:

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  1. Impossible to placate or appease:

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• grim

  1. Discouraging or depressing:
  2. Dismal; gloomy:
  3. Stern or forbidding:

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  1. Discouraging or depressing:
  2. Dismal; gloomy:
  3. Stern or forbidding:

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• die-hard

  1. Stubbornly resisting change or clinging to a seemingly hopeless or outdated cause.
  2. One who stubbornly resists change or tenaciously adheres to a seemingly hopeless or outdated cause:

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  1. Stubbornly resisting change or clinging to a seemingly hopeless or outdated cause.
  2. One who stubbornly resists change or tenaciously adheres to a seemingly hopeless or outdated cause:

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• brassbound

  1. Banded or trimmed with brass or a similar metal, such as bronze.
  2. Inflexible; rigid:
  3. Bold and impudent; brazen.

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  1. Banded or trimmed with brass or a similar metal, such as bronze.
  2. Inflexible; rigid:
  3. Bold and impudent; brazen.

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• adamantine

  1. Made of or resembling adamant.
  2. Having the hardness or luster of a diamond.
  3. Unyielding; inflexible:

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  1. Made of or resembling adamant.
  2. Having the hardness or luster of a diamond.
  3. Unyielding; inflexible:

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• adamant

  1. Not willing to change one's opinion, purpose, or principles; unyielding.
  2. A stone once believed to be impenetrable in its hardness.
  3. An extremely hard substance.

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  1. Not willing to change one's opinion, purpose, or principles; unyielding.
  2. A stone once believed to be impenetrable in its hardness.
  3. An extremely hard substance.

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Stiff

• taut

  1. Pulled or drawn tight; not slack.
  2. Flexed or not loose:
  3. Strained or tense:

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  1. Pulled or drawn tight; not slack.
  2. Flexed or not loose:
  3. Strained or tense:

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• unbendable

  1. not bendable

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  1. not bendable

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• hardened

  1. made or become hard or harder (in various senses)
  2. confirmed or inveterate, esp. in wrong or immoral behavior; habitual

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  1. made or become hard or harder (in various senses)
  2. confirmed or inveterate, esp. in wrong or immoral behavior; habitual

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• rigid

  1. Not flexible or pliant; stiff:
  2. Not moving or flexing:
  3. Not changing or adjusting to different conditions or problems:

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  1. Not flexible or pliant; stiff:
  2. Not moving or flexing:
  3. Not changing or adjusting to different conditions or problems:

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Firm of purpose

• ironclad

  1. Sheathed with iron plates for protection.
  2. Rigid; fixed:
  3. A 19th-century warship having sides armored with metal plates.

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  1. Sheathed with iron plates for protection.
  2. Rigid; fixed:
  3. A 19th-century warship having sides armored with metal plates.

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• fixed

  1. Firmly in position; stationary:
  2. Determined; established; set:
  3. Not subject to change or variation; unchanging:

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  1. Firmly in position; stationary:
  2. Determined; established; set:
  3. Not subject to change or variation; unchanging:

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• unalterable

  1. Impossible to alter:

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  1. Impossible to alter:

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• unrelenting

  1. Having or exhibiting uncompromising determination; unyielding:
  2. Not diminishing in intensity, pace, or effort:

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  1. Having or exhibiting uncompromising determination; unyielding:
  2. Not diminishing in intensity, pace, or effort:

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• determined

  1. Marked by or showing determination; resolute:
  2. Decided or resolved:

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  1. Marked by or showing determination; resolute:
  2. Decided or resolved:

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• immovable

  1. Impossible to move.
  2. Incapable of movement.
  3. Impossible to alter:

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  1. Impossible to move.
  2. Incapable of movement.
  3. Impossible to alter:

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• unshakable

  1. Incapable of being shaken:

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  1. Incapable of being shaken:

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• unyielding

  1. Not giving way to pressure; hard or inflexible:
  2. Incapable of being changed; unalterable:
  3. Not willing to change or be persuaded; resolute:

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  1. Not giving way to pressure; hard or inflexible:
  2. Incapable of being changed; unalterable:
  3. Not willing to change or be persuaded; resolute:

  • Go to "unyielding" definitions
• stubborn

  1. Refusing to change one's mind or course of action despite pressure to do so; unyielding or resolute.
  2. Characterized by a refusal to change one's mind or course of action; dogged or persistent:
  3. Difficult to treat or deal with; resistant to treatment or effort:

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  1. Refusing to change one's mind or course of action despite pressure to do so; unyielding or resolute.
  2. Characterized by a refusal to change one's mind or course of action; dogged or persistent:
  3. Difficult to treat or deal with; resistant to treatment or effort:

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• adamant

  1. Not willing to change one's opinion, purpose, or principles; unyielding.
  2. A stone once believed to be impenetrable in its hardness.
  3. An extremely hard substance.

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  1. Not willing to change one's opinion, purpose, or principles; unyielding.
  2. A stone once believed to be impenetrable in its hardness.
  3. An extremely hard substance.

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• obdurate

  1. Not changing in response to argument or other influence; obstinate or intractable:
  2. Hardened in wrongdoing or wickedness; stubbornly impenitent:
  3. Hardened against feeling; hardhearted:

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  1. Not changing in response to argument or other influence; obstinate or intractable:
  2. Hardened in wrongdoing or wickedness; stubbornly impenitent:
  3. Hardened against feeling; hardhearted:

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• resolute

  1. Firm or determined; unwavering.

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  1. Firm or determined; unwavering.

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• implacable

  1. Impossible to placate or appease:

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  1. Impossible to placate or appease:

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