- Today's Word
Mercurial
mər-KYUR-ee-uhl (or mur-KYOOR-ee-uhl)
Definition
- (adjective) Subject to sudden or unpredictable changes of mood or mind; volatile, capricious.
- Relating to the Roman god Mercury (or the planet Mercury), often implying qualities of cleverness, eloquence, or swiftness.
Example
Her mercurial temperament made her both exhilarating and exhausting to work with; one moment she was full of boundless enthusiasm, and the next, stormy and withdrawn.
Fun Fact
The word “mercurial” is derived from the Roman god Mercury, who was known for his speed, wit, and trickery. Mercury was also the messenger of the gods, and his unpredictable nature made him a fitting inspiration for the term. In alchemy, “mercurial” also refers to mercury (quicksilver), a liquid metal known for its fluid and volatile properties, reinforcing the word’s association with changeability. Over time, “mercurial” evolved to describe not only physical but also emotional and mental shifts, making it a vivid way to characterize people with ever-changing moods.
(verb) To use vague or ambiguous language in order to avoid committing to a clear position or answer.
When asked directly whether he had approved the deal, the CEO equivocated for ten minutes without ever giving a straight answer.
Equivocate derives from the Medieval Latin aequivocare, meaning “to call by the same name,” built from aequus (“equal”) and vox (“voice” or “word”). The idea behind the root is of a word that sounds the same but carries two equally valid meanings — giving the speaker plausible deniability by exploiting ambiguity. It entered English in the 16th century, almost immediately acquiring its negative connotation of deliberate evasiveness.