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Showing results for mercurial. Search instead for mercuri.
Definitions

mercurial

[mer-kyoor-ee-uhl] / mərˈkyʊər i əl /
ADJECTIVE
flighty, temperamental
Synonyms
STRONGEST
changeable effervescent erratic impulsive resilient unpredictable volatile
WEAK
blowing hot and cold bubbleheaded buoyant capricious elastic expansive fickle flaky flip fluctuating gaga gay inconstant irregular irrepressible lighthearted lively lubricious mad mobile movable quicksilver spirited sprightly ticklish unstable up-and-down variable yo-yo
Antonyms
STRONGEST
certain constant predictable reliable stable steady sure unchanging
WEAK
calm tranquil unchangeable unperturbable unvarying

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The mercurial striker last played for his country in October 2023.

From Barron's • Mar. 31, 2026

Master of the trivela, lover of a rabona - mercurial and erratic, but show-stoppingly skilful.

From BBC • Mar. 24, 2026

Isolde is a mercurial character, and Ms. Davidsen expressed her simmering rage, her girlish flirtatiousness, and her serenity in the “Liebestod.”

From The Wall Street Journal • Mar. 11, 2026

In recent years, the mercurial superstar has faced a number of public and legal dramas.

From Los Angeles Times • Mar. 11, 2026

Kendra relished being part of the mercurial procession, overjoyed at the fortunate ending to the terrible night.

From "Fablehaven" by Brandon Mull

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.