vigor, determination


  • enervate

    If something enervates you, it makes you very tired and weak—almost to the point of collapse.

  • unnerve

    If something unnerves you, it makes you upset or nervous; it can also make you lose your courage because it frightens you so much.

  • nerve

    get ready for something difficult or unpleasant

  • nerveless

    marked by calm self-control (especially in trying circumstances)

  • nervous

    unpredictably excitable (especially of horses)

  • nervousness

    the anxious feeling you have when you have the jitters

  • nervy

    being in a tense state

  • unnerving

    inspiring fear

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