What Does The Prefix Photo Mean. The simplest explanation tends to be that a prefix can only attach to a base word (an english word that can be used on its own without a prefix or suffix), while a combining form is an adaptation of a larger word (typically greek or latin) that only attaches to another combining form (meaning neither element cannot stand on its own as an independent word). They are derived from the greek (telos) meaning an end or goal.
It comes from the greek, phos, photos. We must get into the habit of remembering that photo. Photogenic (=looking good in photographs)