The term 'KEEP AT IT' can be summarized by four crossword solutions: PERSEVERE (9 letters), PERSIST (7 letters), GOON (4 letters), and hammeraway (10 letters). Perseverance is the act of continuing to do something despite difficulties or discouragement, while persistence is the quality of continuing in a course of action even in the face of difficulty or opposition. Going on is another way of saying continuing, and hammering away is an idiom that means to continue doing something with determination and effort. All of these words and phrases suggest that one should keep going and not give up.