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root

A2
adjective
Common

Pronunciation

UK

  • /rˈuːt/

US

  • /ˈrut/

Meanings

Noun

  1. the part of a plant that anchors it and takes in water and nutrients

  2. the source, origin, or basic cause of something

  3. a number that satisfies an equation or yields a given value in a radical expression

More meanings
  1. administrator-level access or the top-level base of a computer system or file hierarchy

Verb

  1. to support or cheer for someone, especially a team or contestant

  2. to search around by poking through things roughly or noisily

Beyond the definition

Imagine a mighty tree. What holds it steady, and what helps it live? Its roots. From there, the word grows into other meanings. The root of something can be its origin, the place it comes from, or the deepest cause behind it. In language, a root is the basic part of a word that gives it meaning. People also talk about their family roots, meaning the place, culture, or people they come from. And as a verb, "root" can mean to cheer for someone, as in "We root for the home team." It can even mean the part of a tooth hidden under the gums.

Examples

  1. 1

    Plant anatomy

    The plant died because its roots were too shallow.

  2. 2

    Physical damage

    Tree roots cracked the old stone path.

  3. 3

    Mathematics

    The square root of 81 is 9.

  4. 4

    Problem solving

    We need to get to the root of the problem.

More examples
  1. 5

    Basic cause

    At root, their argument was about money.

    • Phraseat root

      basically, in the most important way

  2. 6

    Family background

    She wants her children to understand their roots.

  3. 7

    Settling down

    After moving around for years, they finally put down roots in one place.

    • Phraseput down roots

      start building a stable life somewhere

  4. 8

    Cause and origin

    His fear of failure is rooted in childhood experience.

    • Patternbe rooted in + source

      come from, or be strongly based on it

  5. 9

    Becoming established

    The idea took root quickly among younger voters.

    • Phrasetake root

      begin to grow or become established

  6. 10

    Support

    We were all rooting for the underdog.

    • Usageroot for

      support and hope someone wins, especially in American English

See also

Contrast

Do not confuse

Used with (collocations)

  • root system
  • deep roots
  • root hair
  • root vegetable

Word family

Explore

  • taproot
  • plant anatomy

Forms and spellings

4 forms open this card.

Main spelling

  • rootnounverbadjective

Forms

  • rootspluralnounverbadjective
  • rootedpast tenseverbnounadjective
  • rooting-ing formverbnounadjective