The term 'keeps from reproducing' can be summarized by the crossword solution 'SPAYS, ' which is a five-letter word. Spaying is a surgical procedure that involves the removal of a female animal's reproductive organs, such as the ovaries and uterus. This procedure is typically performed on cats and dogs to prevent them from reproducing. Spaying also has the added benefit of reducing the risk of certain types of cancer in female animals.