The term 'MAKE CHEERFUL' can be summarized by two crossword solutions, 'GLADDEN' and 'HEARTEN'. Both words mean to make someone feel happier or more cheerful. GLADDEN is derived from the Old English word 'glaeden', which means to make glad or joyful. HEARTEN is derived from the Old English word 'heorten', which means to encourage or inspire. Both words are used to describe the act of making someone feel more cheerful or optimistic.