The crossword solutions for the term SACK; STIMULATE are FIRE (4 letters). The term 'FIRE' can be used in a variety of contexts. In terms of SACK, it is often used to refer to the termination of an employee from their job. In terms of STIMULATE, it is often used to refer to the act of encouraging or motivating someone to do something. Therefore, the term 'FIRE' can be used to describe both the act of terminating an employee and the act of motivating someone.