Inexorable is Merriam-Webster's Word of the Day, defined as something that cannot be stopped or changed. It is a formal adjective, often used to describe the unstoppable progression of time or cycles. For instance, the changing autumn foliage serves as a reminder of the inexorable march of time. The natural cycle of solstices, with days shortening and winter returning, is another inexorable phenomenon noted for millennia. Its origin traces back to the 1500s, deriving from the Latin inexorabilis, meaning "not pliant." Historically, it applied to people or actions resistant to persuasion, as seen in Shakespeare's depiction of Romeo's "inexorable" intents. Today, it frequently modifies nouns like "march," "decline," or "tide," signifying an inevitable progression. While "inexorable" is common, its antonym, "exorable," meaning "capable of being moved by entreaty," is much rarer. Despite pleas, an inexorable force remains unmoved.