The term 'reduce in intensity' can be expressed in three different ways in a crossword puzzle. The first is 'DIM, ' which is a three-letter word meaning to become less bright or intense. The second is 'ABATE, ' which is a five-letter word meaning to reduce in intensity or degree. The third is 'BATE, ' which is a four-letter word meaning to lessen or moderate. All three words refer to the same concept of reducing the intensity of something.