The term 'STICK-TO-IT-___' can be completed with the words 'IVE' and 'PERSIST'. The phrase 'stick-to-it-ive' is an idiom that means to be determined and persistent in achieving a goal. It is often used to encourage someone to keep trying even when faced with difficulties. The word 'PERSIST' has a similar meaning, as it means to continue doing something despite obstacles or discouragement. Therefore, the phrase 'stick-to-it-ive' and 'PERSIST' can be used interchangeably to describe someone who is determined and persistent in achieving their goals.