Which word has a prefix that means against

The word with a prefix that means "against" is "counteract".

The word that has a prefix meaning "against" is "anti-." Some examples of words with this prefix are "antibiotic," "antidepressant," and "anti-inflammatory."

The prefix "anti-" means "against." To find a word with this prefix, you can think of various concepts or topics and check if there are words using the prefix "anti-." Some examples of words with the prefix "anti-" include:

- Antisocial: meaning opposed to or against socializing.
- Antibiotic: meaning a substance that acts against bacteria.
- Antifreeze: meaning a substance that prevents freezing or acts against freezing.
- Antithesis: meaning the direct opposite or contrast of something.

By exploring different subjects or using a dictionary, you can discover several words with the "anti-" prefix that mean against or opposition.