Power Prefix: Anti

Learn these words beginning with the prefix anti, meaning "against," "in opposition to," or "opposite of."

Want to increase your prefix power? Learn our complete set of Power Prefix lists: anti-, con-, dis-, ex-, fore-, inter-, mis-, pre-, pro-, sub-, super-, trans-, uni-

Start learning with an activity...

  • Practice

    Answer a few questions on each word. Get one wrong? We'll ask some follow-up questions. Use it to prep for your next quiz!
  • Spelling Bee

    Test your spelling acumen. See the definition, listen to the word, then try to spell it correctly. Beat your last streak, or best your overall time. Spellers of the world, unite!
  • Vocabulary Jam

    Compete head-to-head in real-time to see which team can answer the most questions correctly. Start a Jam and invite your friends and classmates to join!

Explore the Words

definitions & notes only words
  1. antithesis
    exact opposite
    It was the antithesis of good journalism – all innuendo and barbs.New York Times (Aug 31, 2010)
  2. antipathy
    a feeling of intense dislike
    With eyes lowered in antipathy, he seemed to avoid her gaze with loathing.Wingfield, Lewis
  3. antibiotic
    a substance used to kill microorganisms and cure infections
    Now, there is evidence of an effective new antibiotic that might help save lives among those with the most highly drug-resistant strains.Washington Post (Aug 17, 2019)
  4. anticlimax
    a disappointing decline after a previous rise
    Looking just at the numbers, there was no question that Durant’s return to Chesapeake Energy Arena, one of the most anticipated games of the year, ended up being a terrible anticlimax.The Guardian (Feb 16, 2017)
  5. antidote
    a remedy that stops or controls the effects of a poison
    Fennel sharpens the sight and is an antidote to some poisons.Ophelia
  6. antiseptic
    thoroughly clean and free of disease-causing organisms
    Last summer, I learned that antiseptic mouth rinse kills ticks immediately.Seattle Times (May 23, 2010)
  7. antisocial
    shunning contact with others
    He is extremely social and loves being with other kids and people, while his father is antisocial and I am very shy.Slate (Jun 3, 2019)
  8. antihero
    a protagonist who does not act brave or morally good
    It also reinforces the notion that Yossarian is a classic antihero, rather than a sane innocent trapped in a world of madness.The Guardian (Jun 20, 2019)
  9. anti-inflammatory
    a medicine intended to reduce swelling
    Zimmermann had been having trouble loosening up before starts, and team doctors prescribed physical treatment and anti-inflammatory pills.Washington Post (Aug 5, 2012)
  10. antimatter
    mass consisting of antiparticles of normal substances
    But then, imagine someone finds a simple way to make black holes or antimatter using common materials and wall current?Salon (Jun 17, 2012)
Created on September 9, 2012 (updated August 24, 2020)

Sign up now (it’s free!)

Whether you’re a teacher or a learner, Vocabulary.com can put you or your class on the path to systematic vocabulary improvement.