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prefix

B1
verbnoun

Pronunciation

UK

  • /prˈiːfɪks/

US

  • /ˈprifɪks/

Description

Imagine LEGOs! This is like a special LEGO piece you snap onto the front of another piece to change what you make. In language, it is a group of letters added to the beginning of a word to change its meaning. It usually does not stand alone, so it needs a base word to make sense.

Think about "unhappy." "Happy" means joyful, but add "un-" and now it means not joyful. Or consider "rewrite" - you write something again. These small word parts help us make new words from familiar ones. They can make a word negative (like "disagree"), show that something happens earlier (like "preheat"), or point to place or position (like "submarine").

Examples

  1. 1

    Word formation

    Add the prefix "un-" to "happy" to make "unhappy".

  2. 2

    Meaning changes

    Some prefixes change the meaning of a word without changing the kind of word it is.

  3. 3

    Name titles

    The form asks for your name and any prefix, such as "Ms." or "Dr."

  4. 4

    Invoice codes

    All invoice numbers start with the prefix "INV-".

  5. 5

    File naming

    The system prefixes each uploaded photo with the user's ID.

    • Pattern

      prefix X with Y

      add Y at the beginning of X

  6. 6

    Phone numbers

    International phone numbers are often prefixed with a plus sign.

Forms and spellings

4 forms open this card.

Main spelling

  • prefixnounverb

Forms

  • prefixespluralnounverb
  • prefixedpast tenseverbnoun
  • prefixing-ing formverbnoun