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Showing results for mercurial. Search instead for mercuria.
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.

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

From BBC • Mar. 24, 2026

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

From Los Angeles Times • Mar. 11, 2026

Capital Group ascended to the No. 1 spot by taking advantage of mercurial markets and seeing long-term bets pay off.

From Barron's • Feb. 26, 2026

Fourth was the mercurial Arwel Thomas, who was the star man for Swansea and whom Henson tried to learn off when starting out as a young player.

From BBC • Feb. 21, 2026

His most important question was whether the mercurial and messianic Teller could manage anybody.

From "Big Science" by Michael Hiltzik

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