English Reference

Word

deadliest

Phoneticsdead·li·est

US/ˈdɛdɫiəst/

UK/dˈɛdliəst/

Definition

adj. describes something that is the most likely to cause death or is the most dangerous.

adj. the superlative form of 'deadly'; refers to the entity or event that causes the greatest number of fatalities or possesses the highest potential for lethal outcomes.

Examples

“The cobra is one of the deadliest snakes in the world.”

“The 1918 flu pandemic remains one of the deadliest health crises in modern history, claiming millions of lives worldwide.”

“While many predators rely on sheer strength, the deadliest species often utilize specialized toxins or camouflage to ensure their hunts are successful with minimal energy expenditure.”

Examples

simple

“The cobra is one of the deadliest snakes in the world.”

contextual

“The 1918 flu pandemic remains one of the deadliest health crises in modern history, claiming millions of lives worldwide.”

complex

“While many predators rely on sheer strength, the deadliest species often utilize specialized toxins or camouflage to ensure their hunts are successful with minimal energy expenditure.”

Usage

Superlative form; typically precedes the noun it modifies or follows a linking verb.

Pitfall

the most deadliest

the deadliest

Deadliest is already a superlative; adding 'most' creates a double superlative error.

Real-World Examples

“Israel kills 11 in deadliest attacks on Lebanon since June truce as Iran and Oman continue talks on Hormuz.”
Al Jazeera · 16 Aug 2026
“Eighteen children were among the people killed, Zimbabwe’s police said, in what is believed to be the country’s deadliest such disaster.”
The Guardian · 15 Aug 2026
“The deadliest strike of the month occurred on 2 July.”
UN News · 13 Aug 2026

Collocations

deadliest in the country's

This entry

Level
B2 · Upper Intermediate
Frequency
Frequent
Updated

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English Reference