English prefix
English prefixes are affixes (i.e., bound morphemes that provide lexical meaning) that are added before either simple roots or complex bases (or operands) consisting of (a) a root and other affixes, (b) multiple roots, or (c) multiple roots and other affixes. Examples of these follow: undo (consisting of prefix un- and root do) untouchable (consisting of prefix un-, root touch, and suffix -able) non-childproof (consisting of prefix non-, root child, and suffix -proof) non-childproofable (consisting of prefix non-, root child, root proof, and suffix -able) English words may consist of multiple prefixes: anti-pseudo-classicism (containing both an anti- prefix and a pseudo- prefix).