The term 'BOTH PREFIX' refers to two prefixes, AMBI and STEREO. The prefix AMBI is derived from the Latin word for 'BOTH' and means 'on BOTH sides, around, or in all directions'. The prefix STEREO is derived from the Greek word for 'SOLID' and means 'having three dimensions, SOLID, or having sound coming from two or more sources'. Together, these two prefixes indicate that something is occurring on BOTH sides, around, or in all directions, and/or has three dimensions or sound coming from two or more sources.