FOLD UP is a term used to describe the action of folding something up, such as a piece of paper or fabric. The crossword solutions for this term are COLLAPSE (8 letters), GIVE (4 letters), and FURL (4 letters). COLLAPSE means to fold or COLLAPSE something into a smaller shape or size. GIVE means to hand over or provide something. FURL means to roll or fold something up. All three words can be used to describe the action of folding something up.