The term 'negative prefix' refers to a group of words that are added to the beginning of other words to give them a negative connotation. The most common negative prefixes are MAL, DIS, ANTI, NON, NOT, and MIS. MAL means bad or wrong, DIS means apart or away, ANTI means against, NON means not, NOT means no or none, and MIS means wrong or bad. Together, these prefixes can be used to create words with a negative meaning.