enemy

noun

en·​e·​my ˈe-nə-mē 

plural enemies

1

: one that is antagonistic to another

especially : one seeking to injure, overthrow, or confound an opponent

2

: something harmful or deadly

alcohol was his greatest enemy

3

a

: a military adversary

b

: a hostile unit or force

Synonyms

• opponent
• foe
• hostile

Examples of enemy in a Sentence

He made a lot of enemies during the course of his career.

Tradition is the enemy of progress.

Recent Examples on the Web

Bomarc rockets had jets designed to propel a W40 nuclear warhead into high-flying USSR aircraft, which would detonate in the sky, showering the earth with radioactive debris, neutralizing quite a few enemies of American freedom. —Literary Hub, 5 Aug. 2025

Strategic bombings are a critical component of modern warfare, crippling supply lines, disrupting operations, and breaking enemy morale. —Vikram Mittal, Forbes.com, 4 Aug. 2025

In the war against cancer, enemy intel is extremely valuable. —New Atlas, 3 Aug. 2025

As the population of gall insects increases, so do the natural enemies. —Tim Johnson, Chicago Tribune, 3 Aug. 2025

Word History

Etymology

Middle English enmy, enemi, borrowed from Anglo-French enemi, going back to Latin inimīcus, noun derivative of inimīcus, adjective, "of an opponent, unfriendly, hostile," from in- in- entry 1 + amīcus "friendly, well-disposed, loving" — more at amiable

First Known Use

13th century, in the meaning defined at sense 1

Phrases Containing enemy

• behind enemy lines
• enemy territory
• mortal enemy
• public enemy number one

Kids Definition

enemy

noun

en·​e·​my ˈen-ə-mē 

plural enemies

1

: one that tries to hurt or overthrow or that seeks the failure of another

2

: something that harms

3

a

: a nation with which a country is at war

b

: a military force or a person belonging to such a nation

Etymology

Middle English enemi "enemy," from early French enemi (same meaning), from Latin inimicus (same meaning), from in- "not" and amicus "friend"