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adj Common

lethal

LEE-thuhl

Lethal (adj) means Capable of causing death; deadly. Example: “The snake's venom is lethal to small animals.”

adj
1
Capable of causing death; deadly.
"The snake's venom is lethal to small animals."
"Police recovered a lethal weapon from the scene."

How to use lethal

Learner’s notes

In plain EnglishDeadly — able to kill.

Common pairings
a lethal dose lethal weapon lethal force lethal injection

Word forms

more lethal comparative, lethals plural, most lethal superlative

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Test yourself on “lethal” A quick quiz — meaning, synonyms & usage

Fill the gap

Can you complete this real example?

The snake's venom is _____ to small animals.

Etymology

From Latin letalis, "deadly," from letum, "death."

Origin: Latin

Related words

Frequently asked questions

What does “lethal” mean?

The word “lethal” means capable of causing death; deadly. In plain terms, deadly — able to kill.

How do you pronounce “lethal”?

“Lethal” is pronounced LEE-thuhl (/ˈliː.θəl/ in IPA).

How do you use “lethal” in a sentence?

Here is “lethal” used in a sentence: “The snake's venom is lethal to small animals.”

What part of speech is “lethal”?

“Lethal” is an adjective.

Where does the word “lethal” come from?

The word “lethal” comes from Latin. From Latin letalis, "deadly," from letum, "death.".

Is “lethal” a common word?

“Lethal” is a fairly common word in modern English.

What is the difference between lethal and deadly?

Lethal and deadly are close synonyms, both meaning capable of causing death, and are often used interchangeably. Lethal tends to appear more in technical, medical, or precise contexts such as a lethal dose, while deadly is more common in general or dramatic descriptions.

Can lethal be used figuratively?

Yes, lethal is sometimes used figuratively to describe something extremely effective or damaging, such as a lethal argument or a lethal combination, without literally involving death. This extended use draws on the core sense of being highly dangerous or destructive.

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