inflexible

Something inflexible does not bend easily. A stiff back can make you inflexible, or unable to fold over and touch your toes. A really busy schedule can make you inflexible or unable to bend or accommodate your plans for others.

Combine the Latin root words in- meaning "not" and flectere, "to bend" and you have the very meaning of inflexible: not able to bend. Ballet is not for the inflexible or those people who simply are not bendy by nature. Compromise also is not for the inflexible, or those who are really rigid or set in their ways.

Definitions of inflexible
1

adj resistant to being bent

“an inflexible iron bar”
“an inflexible knife blade”
Synonyms:
inelastic
not elastic
muscle-bound
having stiff muscles as the result of excessive exercise
rigid, stiff
incapable of or resistant to bending
semirigid
not fully rigid
Antonyms:
flexible, flexile
able to flex; able to bend easily
elastic
capable of resuming original shape after stretching or compression; springy
bendable, pliable, pliant, waxy
capable of being bent or flexed or twisted without breaking
double-jointed
having unusually flexible joints especially of the limbs or fingers
limber, supple
(used of persons' bodies) capable of moving or bending freely
limber
(used of artifacts) easily bent
spinnable, spinnbar
capable of being spun into fibres
stretched
(of muscles) relieved of stiffness by stretching
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adj incapable of change

“a man of inflexible purpose”
Synonyms:
adamant, adamantine, inexorable, intransigent
impervious to pleas, persuasion, requests, reason
die-hard, rock-ribbed
tradition-bound and obstinately opinionated
fossilised, fossilized, ossified
set in a rigidly conventional pattern of behavior, habits, or beliefs
hard-core
stubbornly resistant to change or improvement
brassbound, ironclad
inflexibly entrenched and unchangeable
Antonyms:
flexible
capable of being changed
limber, supple
(used of e.g. personality traits) readily adaptable
negotiable, on the table
able to be negotiated or arranged by compromise
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adj incapable of adapting or changing to meet circumstances

“an inflexible law”
Synonyms:
rigid, unbending
unadaptable
not adaptable

adj not making concessions

Synonyms:
sturdy, uncompromising
hard-line, hardline
firm and uncompromising
Antonyms:
compromising, conciliatory, flexible
making or willing to make concessions
yielding
tending to give in or surrender or agree
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