The crossword solution for the term 'PREFIX WITH NOURISHED' is MAL, which is a three-letter prefix. Mal- is derived from the Latin word malus, meaning bad or evil. It is commonly used in English to form words that describe something as being bad or wrong. For example, the word 'MALNOURISHED' means to be deprived of proper nutrition. Therefore, the answer to the crossword clue 'PREFIX WITH NOURISHED' is MAL.