Synonyms of merciless

merciless

adjective

ˈmər-si-ləs 

as in ruthless

having or showing a lack of sympathy or tender feelings

she is a merciless competitor at board games of any kind

Synonyms & Similar Words

• ruthless
• stony
• pitiless
• brutal
• hard
• oppressive
• harsh
• unmerciful
• cruel
• abusive
• remorseless
• heartless
• stern
• callous
• vicious
• inhuman
• compassionless
• malicious
• unsparing
• hateful
• tough
• grim
• inhumane
• soulless
• unfeeling
• obdurate
• insensitive
• take-no-prisoners
• hard-hearted
• unsympathetic
• uncharitable
• cold-blooded
• insensate
• thick-skinned
• slash-and-burn
• severe
• indurate
• savage
• affectless
• pachydermatous
• desensitized
• hard-boiled
• case-hardened
• thoughtless
• uncaring
• rough
• ironhearted
• heedless
• unthinking
• mean
• stonyhearted
• ungentle
• unfriendly
• boorish
• inconsiderate
• spiteful
• malevolent
• unloving
• virulent
• cold
• disagreeable
• rough-and-tumble
• heavy-handed
• brutish
• barbarous
• surly
• ironfisted
• acrimonious
• bestial
• jackbooted
• sledgehammer
• rancorous
• ill-natured
• ironhanded
• hard-bitten
• evil-minded
• ill-tempered
• austere
• frosty
• knock-down, drag-out

Antonyms & Near Antonyms

• sympathetic
• warm
• sensitive
• merciful
• gentle
• humane
• compassionate
• charitable
• benevolent
• kind
• kindly
• mild
• tender
• lenient
• friendly
• kindhearted
• indulgent
• gracious
• softhearted
• warmhearted
• tenderhearted
• cordial
• benignant
• loving
• tolerant
• affectionate
• good-natured
• understanding
• clement
• fond
• good-tempered

Example Sentences

Recent Examples of merciless

The show was merciless with its satirical barbs against top government officials and current events, just as its parent company Paramount Skydance has pushed to acquire Warner Bros Discovery. — Erik Pedersen, Deadline, 19 May 2026

Golf is a merciless sport, requiring a goldfish’s memory and a bull’s stubbornness. — Dana O’Neil, CNN Money, 18 May 2026

But the land is merciless, and their dreams are shattered when a wildfire breaks out. — Samantha Stutsman, PEOPLE, 16 May 2026

Ron White, Joe DeRosa, and Tony’s number one favorite comic, Tony Hinchcliffe (played by Adam Ray), showed the crowd exactly what effortless and absolutely merciless veteran comedy looks like. — Malina Saval, Los Angeles Times, 13 May 2026