That which is prefixed; esp., one or more letters or syllables combined or united with the beginning of a word to modify its signification; as, pre- in prefix, con- in conjure.
source: Webster 1913
verb
attach a prefix to
Prefixed words.
source: WordNet 3.0
To put or fix before, or at the beginning of, another thing; as, to prefix a syllable to a word, or a condition to an agreement.
