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crumble

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verb American English pronunciation: crumble /ˈkrʌmb(ə)l/ 
Word Forms
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present tense
I/you/we/theycrumble
he/she/itcrumbles
present participlecrumbling
past tensecrumbled
past participlecrumbled
  1. 1
    [intransitive/transitive] to break something into very small pieces, or to be broken into very small pieces

    The soft earth of the riverbank crumbled under his feet.

    Crumble the cookies over the fruit mixture.

    1. a.

      crumble

      or

      ˌcrumble aˈway

      [intransitive] if something hard such as stone or a brick crumbles or crumbles away, parts of it fall off because it is very old or damaged

      Part of the roof had rotted away and the exposed plaster was beginning to crumble.

  2. 2
    [intransitive] to stop existing or being effective

    My determination crumbled as soon as I saw her.

    The government seemed powerless to prevent its weak economy from crumbling further.

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