Adjective ponderous has 3 senses
  1. heavy, lumbering, ponderous - slow and laborious because of weight; "the heavy tread of tired troops"; "moved with a lumbering sag-bellied trot"; "ponderous prehistoric beasts"; "a ponderous yawn"
    Antonym: light-footed (indirect, via heavy-footed)
  2. ponderous - having great mass and weight and unwieldiness; "a ponderous stone"; "a ponderous burden"; "ponderous weapons"
    Antonym:
    light (indirect, via heavy)
  3. ponderous - labored and dull; "a ponderous speech"
    Antonym:
    interesting (indirect, via uninteresting)
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