Dictionary.com
Thesaurus.com
Synonyms

enemy

American  
[en-uh-mee] / ˈɛn ə mi /

noun

  • enemies
    plural
  1. a person who feels hatred for, fosters harmful designs against, or engages in antagonistic activities against another; an adversary or opponent.

    Synonyms:
    antagonist
    Antonyms:
    friend
  2. an armed foe; an opposing military force.

    The army attacked the enemy at dawn.

    Antonyms:
    ally
  3. a hostile nation or state.

  4. a citizen of such a state.

  5. enemies, persons, nations, etc., that are hostile to one another.

    Let's make up and stop being enemies.

  6. something harmful or prejudicial.

    His unbridled ambition is his worst enemy.

  7. the Enemy, the Devil; Satan.


adjective

  1. belonging to a hostile power or to any of its nationals.

    enemy property.

  2. Obsolete. inimical; ill-disposed.

enemy British  
/ ˈɛnəmɪ /

noun

  1. a person hostile or opposed to a policy, cause, person, or group, esp one who actively tries to do damage; opponent

    1. an armed adversary; opposing military force

    2. ( as modifier )

      enemy aircraft

    1. a hostile nation or people

    2. ( as modifier )

      an enemy alien

  2. something that harms or opposes; adversary

    courage is the enemy of failure

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Grammar

See collective noun.

Synonym Usage

Enemy, foe refer to a dangerous public or personal adversary. Enemy emphasizes the idea of hostility: to overcome the enemy; a bitter enemy. Foe, a more literary word, may be used interchangeably with enemy, but emphasizes somewhat more the danger to be feared from such a one: deadly foe; arch foe of humankind ( the Devil ).

Other Word Forms

Derived Forms

Inflected Forms

Nouns

Etymology

Origin of enemy

First recorded in 1300–1350; Middle English enemi, from Anglo-French, Old French, from Latin inimicus “unfriendly,” equivalent to in- in- 3 + amicus “friendly, friend”; see amicable

Explanation

An enemy is a hostile opponent, like your sworn Scrabble enemy who vows to get revenge on your last triple word score. An enemy is a person who actively opposes someone or something. The Latin word inimicus, meaning "hostile, unfriendly," is the root of enemy, and it comes from the prefix in-, or "not," and amicus, "friend:" an enemy is "not a friend." When two armies fight each other, they both think of the opposing army as the enemy.

Keep Reading on Vocabulary.com

Vocabulary lists containing enemy

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

The program, designed to use satellites to track enemy missiles and aircraft, would be worth billions of dollars.

From The Wall Street Journal Aug. 20, 2026

The people in power—officers and civilians—seem to have ignored the possibility that the enemy would attack our weakest links, in this case the supply hubs.

From Slate Aug. 19, 2026

In a Facebook post shortly after his dismissal, Fedorov listed his achievements and said he would "continue... to defeat the enemy through asymmetry, speed of innovation, and organisational strength".

From BBC Aug. 19, 2026

But Pyongyang has rejected his overtures, labelling Seoul its "most hostile" enemy and declaring itself an "irreversible" nuclear state.

From Barron's Aug. 18, 2026

The Hunley was the first submarine to sink an enemy ship, but it was not the first sub to be used in wartime, nor was it the first to attack an enemy vessel.

From "Shipwrecked!" by Martin W. Sandler

And as the saying goes, with friends like these, who needs enemies?

From Slate Aug. 25, 2026

"Do not turn rivals into enemies," he said.

From Barron's Aug. 19, 2026

By 2024, the Times would later admit, his enemies had metamorphosed him.

From The Wall Street Journal Aug. 18, 2026

Gen and Casey aren’t enemies, but they’re not exactly friends, either.

From Salon Aug. 18, 2026

When the jar hit him and shattered, his fluttering shroud soaked up the liquor, and the dervish was taken, like the enemies of Shadrach, with a sudden burst.

From "The Many Assassinations of Samir, the Seller of Dreams" by Daniel Nayeri

Vocabulary.com logo
by dictionary.com

Dictionary.com's Learning Companion

Go beyond just looking up words.
Remember them forever with VocabTrainer.

Start training