Tone up

verb

Definitions

Verb
  1. 1
    To cause to give a higher tone or sound; to give a higher tone to; to make more intense; to heighten; to strengthen. intransitive, transitive
  2. 2
    give a healthy elasticity to wordnet
  3. 3
    To firm and strengthen the muscles of the body by regular exercise. intransitive, transitive

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