The term 'let up on' can be summarized by the crossword solutions RELIEVE (7 letters), EASED (5 letters), EASE (4 letters), and REES (4 letters). RELIEVE means to reduce or lessen something, such as pain, pressure, or intensity. EASED is the past tense of the verb EASE, which means to make something less difficult or severe. REES is a variant spelling of the verb 'to EASE, ' meaning to make something less difficult or severe. All of these words are related to the phrase 'let up on, ' which means to reduce the intensity of something or to make it less difficult.