The term 'boot attachment' can be broken down into three words: SKI, SPUR, and LEG. SKI is a 3-letter word that refers to a type of recreational activity involving sliding down a snow-covered slope on skis. SPUR is a 4-letter word that refers to a metal device with a sharp point or row of points at one end, used for prodding animals or as a form of ornamentation. Finally, LEG is a 3-letter word that refers to the lower limb of a human body, used for walking and standing. Together, these three words form the term 'boot attachment, ' which is a device used to attach boots to skis.