murderous

adjective

mur·​der·​ous ˈmər-d(ə-)rəs 

1

a

: having the purpose or capability of murder

a murderous machine gun

b

: characterized by or causing murder or bloodshed

a murderous dictator

2

: having the ability or power to overwhelm : devastating

murderous heat

murderously adverb

murderousness noun

Synonyms of murderous

• oppressive
• harsh
• searing
• brutal
• tough
• severe
• rough
• cruel
• hard
• grim
• inhuman

Examples of murderous in a Sentence

I can't stand this murderous heat.

The lead runner set a murderous pace.

Recent Examples on the Web

Being on house arrest in the most recent installment, the murderous mom of two takes a break from putting on this metaphorical mask, allowing her vulnerability to show. —Kaleigh Werner, Footwear News, 11 June 2026

Nothing that reflects the sheer abjection of the murderous dog pounds of the nineteenth and twentieth centuries or the many individual cruelties visited upon dogs. —Literary Hub, 10 June 2026

This despite its violent, heroic left-leaning revolutionaries and a cabal of right-wing racists with unapologetically murderous intentions. —Stephen Schaefer, Boston Herald, 2 June 2026

Except… there’s no indication Martin is repenting for his murderous vigilante rampage. —Ben Travers, IndieWire, 1 June 2026

Word History

First Known Use

1535, in the meaning defined at sense 1a

Kids Definition

murderous

adjective

mur·​der·​ous ˈmərd-(ə-)rəs 

1

: intending or capable of causing murder or bloodshed : deadly

murderous machine-gun fire

2

: very difficult to bear or withstand

a murderous glance

murderous heat

murderously adverb