The crossword solution for the term 'PREFIX WITH BODY' is ANTI, which is a four-letter word. The prefix 'ANTI-' is derived from the Greek language and is used to describe something that is opposed to or against something else. It is commonly used in English to describe a person or thing that is opposed to a particular political system, ideology, or belief. For example, someone who is ANTI-war would be opposed to war. When combined with the word 'BODY, ' the term 'ANTI-BODY' refers to a type of protein produced by the immune system to fight off foreign invaders such as bacteria and viruses.