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Definitions

mercilessly

[mur-si-lis-lee] / ˈmɜr sɪ lɪs li /
ADVERB
brutally
Synonyms
STRONGEST
ferociously fiercely relentlessly ruthlessly savagely viciously
WEAK
atrociously barbarically barbarously brutishly callously demoniacally diabolically ferally hardheartedly heartlessly in cold blood inexorably inhumanely inhumanly meanly murderously pitilessly remorselessly something fierce something terrible unkindly unrelentingly
Antonyms
WEAK
gently humanely kindly nicely

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.

By mercilessly hardening her heart, Judit hopes to withstand the tribulations of poverty and betrayal.

From The Wall Street Journal • Apr. 3, 2026

For two decades Tom Brady and Bill Belichick mercilessly terrorised the league year after year, winning those six Super Bowl titles from nine appearances in an era of unrivalled dominance.

From BBC • Feb. 4, 2026

The private equity model has struck again—this time, even more quickly and mercilessly than usual.

From Slate • Jan. 23, 2026

Software stocks have been mercilessly battered in recent weeks, and that trend has continued in a striking way to start this year.

From MarketWatch • Jan. 17, 2026

The soles of her feet ached mercilessly, and her lungs felt tight with each breath.

From "Beasts of Prey" by Ayana Gray

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