affix

from The American Heritage® Dictionary of the English Language, 5th Edition.

• transitive verb To secure to something; attach.
• transitive verb To impute; attribute.
• transitive verb To place at the end; append.
• transitive verb Linguistics To add as an affix.
• noun Something that is attached, joined, or added; an appendage or addition.
• noun Linguistics A word element, such as a prefix or suffix, that can only occur attached to a base, stem, or root.

from The Century Dictionary.

• noun In mathematics, the complex number x + iy is denoted by a single letter, z; the point P, (x, y), is then called the affix of the value z; the number z is also spoken of as the affix of the point P.
• To fix; fasten, join, or attach; conjoin, add, or append; make an adjunct or part of: followed by to.
• Synonyms Add, Affix, Annex, etc. (see add), suffix, superadd, tack on, fasten on, join.
• noun That which is joined, attached, or added; an addition or attachment.
• noun In philology, a syllable or letter, prefix or suffix, attached to a word or a verbal root or stem, as in good-ness, veri-fy, civil-ize, un-able, un-con-form-able.
• noun In decorative art, any small feature, as a figure, a flower, or the like, added for ornament to a vessel or other utensil, to an architectural feature, etc.: used especially with reference to ceramics and bronzes.

from the GNU version of the Collaborative International Dictionary of English.

• noun That which is affixed; an appendage; esp. one or more letters or syllables added at the end of a word; a suffix; a postfix.
• transitive verb To subjoin, annex, or add at the close or end; to append to; to fix to any part of
• transitive verb To fix or fasten in any way; to attach physically.
• transitive verb To attach, unite, or connect with
• transitive verb obsolete To fix or fasten figuratively; -- with on or upon.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun That which is affixed; an appendage.
• noun linguistics A bound morpheme added to a word’s stem; formerly applied only to suffixes (also called postfixes), the term as now used comprises prefixes, suffixes, infixes, circumfixes, and suprafixes.
• noun mathematics The complex number associated to the point in the Gauss Plane with coordinates .
• verb To attach.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• verb attach to
• noun a linguistic element added to a word to produce an inflected or derived form
• verb add to the very end
• verb attach or become attached to a stem word