leaden - definition and synonyms

adjective 

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/ˈled(ə)n/
  1. 1
    feeling that your body is heavy and difficult to move because you are very tired

    The child’s eyelids were leaden with sleep.

  2. 2
    showing a lack of enthusiasm, energy, or interest

    ‘We have not reached a solution,’ droned the professor in a leaden tone.