inexorable

Impossible to stop, alter, or resist; inevitable.

Not capable of being persuaded by entreaty; relentless.

Not to be persuaded or moved by entreaty or prayer; unyielding; unrelenting: as, an inexorable creditor; inexorable law.

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; firm; determined; unyielding; unchangeable; inflexible; relentless; — of people and impersonal forces

Unable to be persuaded; relentless; unrelenting

Impossible to stop or prevent; inevitable

Adamant; severe

impervious to pleas, persuasion, requests, reason

not to be placated or appeased or moved by entreaty