Merriam Webster’s Word of the Day for Thursday, July 9th was inexorable.
not to be persuaded, moved, or stopped : relentless
As always, they provided interesting etymological insight into the word:
The Latin antecedent of “inexorable” is “inexorabilis,” which is itself a combination of the prefix “in-,” meaning “not,” plus “exorabilis,” meaning “pliant” or “capable of being moved [...]