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dull

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verb [transitive] dull pronunciation in American English /dʌl/ 
Word Forms
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present tense
I/you/we/theydull
he/she/itdulls
present participledulling
past tensedulled
past participledulled
  1. 1
    to make a feeling weaker

    The drug can dull the pain, but not completely eliminate it.

  2. 2
    to make someone's mind slower or less able to understand, think, hear, etc.

    Fatigue had dulled her mind.

    His senses were dulled by alcohol.

  3. 3
    to make a sound weaker or less clear

    The carpet dulled the sound of their footsteps.

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