Art is the expression of creativity or imagination. The word art comes from the Latin word ars, which, loosely translated, means "arrangement". Art is commonly understood as the act of making works (or artworks) which use the human creative impulse and which have meaning beyond simple description. While art is often distinguished from crafts and recreational hobby activities, this boundary can at times be hard to define. The term creative arts denotes a collection of disciplines whose principal purpose is the output of material for the viewer or audience to interpret. As such, art may be taken to include forms ranging from literary forms (prose writing and poetry); performance-based forms (dance, acting, drama, and music); visual and "plastic arts" (painting, sculpture, photography, illustration); to forms that also have a functional role, such as architecture and fashion design. Art may also be understood as relating to creativity, æsthetics and the generation of emotion.