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Dictionarystrengthen
verb

strengthen

To make or become stronger.

Regular exercise helps strengthen your muscles and protect your joints.

Etymology
strengthEnglishpower; firmness
+enEnglishto make or become

Strength names the quality of being strong. The verb-forming ending means to cause that quality or to acquire more of it.

More examples

  • Workers strengthen the bridge with extra steel supports.
  • New evidence strengthens her argument.
  • Their friendship has strengthened over the years.
  • The storm is strengthening as it moves toward shore.

Forms

strengthen · strengthens · strengthened · strengthening

strength noun — The quality of being strong.

strong adjective — Having great power or resisting force.

Similar words

reinforce
Emphasizes adding support to something already present.
fortify
Emphasizes making something better able to resist attack or harm.
bolster
Often means supporting confidence, an argument, or a weak position.