anti

Short definition from Wiktionary

Adjective

1. 1
   Opposed to something.
2. 2
   That has a torsion angle between 90° and 180°

Noun

1. 1
   A person opposed to a concept or principle.
2. 2
   A fan who objects to a particular creator, franchise, fandom, character, ship, etc., especially on moral or sociopolitical grounds.

Preposition

1. 1
   Alternative form of anti-.