prefix

Meanings

1. 1
   noun

   A group of letters added to the front of a word to change its meaning, such as "un-" in "unhappy."

   The prefix "re-" means "again," as in "rewrite."

2. 2
   verb

   To add something to the front or beginning of something else.

   You should prefix each filename with the date.

From Middle English prefixen, from Middle French prefixer, from Latin praefīxus, past participle of praefīgō (“to (fix, fasten, set up) in front”, “to fix on the (end, extremity)”) (from prae- (“before”) + fīgō (“to fix”, “to fasten”, “to affix”)), equivalent to pre- + -fix.

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