Prefix

Part of speech: noun (n.)

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.

Part of speech: verb (v.)

1. 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.

2. To set or appoint beforehand; to settle or establish antecedently. [Obs.] " Prefixed bounds. " Locke. And now he hath to her prefixt a day. Spenser.