# anti-

> English word · Prefix · IPA /ˈænˌti/

## Definitions
1. Against, opposed to.
2. Counteracting, neutralizing.
3. The opposite of what is typically expected.
4. Physically opposite, reverse in position or direction.
5. A rival or counterpart to.
6. Composed of antimatter.
7. Reacting with immunoglobins found in the specified animal.

## Etymology
Etymology tree
Ancient Greek ἀντι- (anti-)der.
English anti-
From Ancient Greek ἀντι- (anti-, “against”). Cognate with Old English and- (“against, in return, back, un-”), German ent- (“off, away, un-”). Doublet of ante- and un-.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/anti