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Showing results for mercurial. Search instead for mercurou.
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.

Chelsea's Cole Palmer showed his quality with a goal in the Euro 2024 final in Berlin and has the sort of mercurial talent that could give England an X-factor in the World Cup.

From BBC • Apr. 1, 2026

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

From Los Angeles Times • Mar. 11, 2026

Mr. McCallum’s sharp alliterations and choice of words transform a book review into a wonderful exploration of a mercurial star.

From The Wall Street Journal • Mar. 2, 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

Her personality was too big and mercurial to be contained in a frail human body.

From "Darius the Great Is Not Okay" by Adib Khorram

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