Definition - A letter or letters put at the beginning of a word to create a new word.

Example -
The be in before and the a in arise.

Etymology -
The word derives from the Latin præfixus, fixed in front (from præ, before + figere, to fasten or to fix).

Oxford English Dictionary -
Its first citation is from 1614: "Those adherents of words, which they call præfixa and suffixa."
(Brerewood Lang. & Relig. ix. 63)

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