Толковый словарь английского языка - prefix

I. transitive verb Etymology: Middle English, from Middle French ~er, from Latin praefixus Date: 15th century to fix or appoint beforehand, to place in front, II. noun see: fix Date: 1646 an affix attached to the beginning of a word, base, or phrase and serving to produce a derivative word or an inflectional form, a title used before a person's name, ~al adjective III. adjective Date: 1971 characterized by placement of an operator before its operand or before its two operands if it is a binary operator