General "Against" or "Opposite" Meaning:
* antibiotic: A substance that kills or inhibits the growth of bacteria.
* antibody: A protein produced by the immune system to fight off infection.
* antidote: A remedy for a poison or other harmful substance.
* antifreeze: A substance that lowers the freezing point of a liquid, typically used in car radiators.
* antihistamine: A medication that blocks the effects of histamine, a chemical released by the body in allergic reactions.
* antisocial: Unwilling or unable to associate with others in a normal way.
* antitrust: Relating to laws that prevent monopolies and other forms of unfair business practices.
* antipathy: A strong feeling of dislike or aversion.
"Resembling an Earlier Time" Meaning:
* antebellum: Occurring or existing before the American Civil War.
* antediluvian: Very old or out of date.
* antiquarian: A person who studies or collects antiques.
* antiquated: Old-fashioned or outdated.
Other Words:
* anticlimax: A disappointing or less exciting conclusion to something.
* antimatter: Matter that is composed of antiparticles, which have the opposite charge and spin of their ordinary counterparts.
* antenna: A device that receives or transmits radio waves.
* antarctic: Relating to the South Pole or the region around it.
* antiseptic: A substance that kills or inhibits the growth of microorganisms, especially bacteria.
This is just a starting point - there are many more words out there with the root "anti-."