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strengthen

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verb American English pronunciation: strengthen /ˈstreŋθən/ 
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present tense
I/you/we/theystrengthen
he/she/itstrengthens
present participlestrengthening
past tensestrengthened
past participlestrengthened
  1. 1
    [transitive] to make your body physically stronger or more healthy

    Aerobic exercise strengthens the heart.

    1. a.
      [intransitive] to become physically stronger

      Doctors say his injured shoulder will take time to strengthen.

  2. 3
    [transitive] to make a feeling, decision, relationship, etc. stronger or more powerful

    Her objections only strengthened my resolve to open my own business.

    1. a.
      [intransitive] to become stronger or more powerful

      a sense of community that has strengthened over time

  3. 4
    [transitive] to make an organization, business, army, etc. more powerful, successful, or effective

    The secretary will discuss strengthening the U.N. force.

    programs aimed at strengthening local economies

    1. a.
      to make a law or punishment stronger

      Congress debated strengthening the Clean Air Act.

  4. 5
    [transitive] to give support to a position or argument

    The new evidence strengthens Wilkins' case.

  5. 6
    [intransitive/transitive] to increase the value of the money of a country

    The appointment of a new premier in Italy helped strengthen the lira.

    The dollar continues to strengthen against the yen.

  6. 7
    [intransitive] if the wind or a current strengthens, it becomes faster or more powerful

    The gale continued to strengthen throughout the night.

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