The term JOIN US! can be broken down into three crossword solutions: COME (4 letters), SIT (3 letters), and COMEALONG (9 letters). This phrase is an invitation to join a group or activity, and the three words used in the crossword solutions are all related to this idea. COME is a verb that implies movement towards a certain location, while SIT suggests settling down in a particular place. COMEALONG is a combination of the two words, emphasizing the idea of joining a group or activity.