The term 'HALF' can be represented by three different prefixes: HEMI, SEMI, and DEMI. All three of these prefixes are derived from the Greek language and have the same meaning of 'HALF'. HEMI is derived from the Greek word 'hemisus', SEMI is derived from the Greek word 'SEMI', and DEMI is derived from the Greek word 'demiourgos'. Each of these prefixes can be used to describe something that is only HALF of its original size or quantity. For example, a 'HEMISPHERE' is HALF of a sphere, a 'SEMICIRCLE' is HALF of a circle, and a 'DEMIGOD' is HALF-human and HALF-god.