Difference between Inflexible and Inexorable

INFLEXIBLE vs INEXORABLE: ADJECTIVE

Literal meanings
Incapable of adapting or changing to meet circumstances
Not making concessions
Not easily bent; stiff or rigid. : stiff.
Incapable of being changed; unalterable.
Refusing to change one's attitude, purpose, or principles; immovable.
Not capable of being bent; stiff; rigid; firm; unyielding.
Firm in will or purpose; not to be turned, changed, or altered; resolute; determined; unyieding; inexorable; stubborn.
Incapable of change; unalterable; immutable.
Not willing to change, e.g. one's opinion or habits; obstinate; stubborn; resolute; determined.
Incapable of change
Resistant to being bent
Extended meanings; incapable of change

Not to be placated or appeased or moved by entreaty
Not capable of being swayed or diverted from a course; unsusceptible to persuasion
Impossible to stop, alter, or resist; inevitable.
Not capable of being persuaded by entreaty; relentless.
Unable to be persuaded; relentless; unrelenting
Impossible to stop or prevent; inevitable
Adamant; severe
Impervious to pleas, persuasion, requests, reason

Not flexible; incapable of bending or of being bent; rigid: as, an inflexible rod.
Unyielding in temper or purpose; that will not yield to prayers or arguments; firm in purpose; incapable of being turned; not to be prevailed on.
Not to be changed or altered; unalterable; not permitting variation.
Synonyms Rigid, stiff.
Inexorable, inflexible, resolute, steadfast, unbending, unyielding, immovable, unrelenting; obstinate, stubborn, dogged.

She would have none of him"- W.Churchill
Synonyms Inexorable, Unrelenting, Relentless, Implacable; immovable. Inexorable, literally not to be moved or changed by prayer or petition, expresses an immovable firmness in refusing to do what one is entreated to do, whether that be good or bad; it is also used figuratively: as, inexorable death, time, fate. The other three words apply to feeling, which is generally bad, but unrelenting and relentless may by figure apply also to action: as, an unrelenting pursuit; a relentless massacre. Implacable applies wholly to feeling, meaning unappeasable, and in this use is the strongest of the three; it goes with such strong words as animosity and resentment.
Not to be persuaded or moved by entreaty or prayer; unyielding; unrelenting: as, an inexorable creditor; inexorable law.

Fossilized, Flinty, Stiffened, Adamant, Inexorable, Ironclad, Adamantine, Stiff, Uncompromising, Unadaptable, Unyielding, Ossified, Unbending, Intransigent, Rigid

Irreversible, Remorseless, Inescapable, Inevitable, Stern, Adamant, Inflexible, Intransigent, Grim, Unforgiving, Adamantine, Unappeasable, Unrelenting, Relentless, Implacable

Fossilized, Flinty, Stiffened, Adamant, Inexorable, Ironclad, Adamantine, Stiff, Uncompromising, Unadaptable, Unyielding, Ossified, Unbending, Intransigent, Rigid

Irreversible, Remorseless, Inescapable, Inevitable, Stern, Adamant, Inflexible, Intransigent, Grim, Unforgiving, Adamantine, Unappeasable, Unrelenting, Relentless, Implacable

For Verizon to be so inflexible is horrible!
In trust planning, irrevocable no longer means inflexible.
We called Regents and the staff was inflexible.
An inflexible, categorical rule neglects these additional considerations.
Offers fall apart when both sides are inflexible.
Long cable is inflexible and gets kinked easily.
Development and validation of the inflexible eating questionnaire.
Identified by Dialogue Partners: The dialogue partners reported that inflexible federal workplace policies create the following issues for womenwho have caregiving responsibilities: Inflexible workpla
For example, a family which is rigidly inflexible toward relationship roles would be expected to be rigidly inflexible in the disciplining of children.
Inflexible parents, inflexible kids: A sixyear longitudinal study of parenting style and the development of psychological flexibity in adolescence.