Read the dictionary definition of ponderous. All definitions for this word.
1. having great mass and weight and unwieldiness
1. a ponderous stone
2. a ponderous burden
3. ponderous weapons
2. slow and laborious because of weight
1. the heavy tread of tired troops
2. moved with a lumbering sag-bellied trot
3. ponderous prehistoric beasts
4. a ponderous yawn
3. labored and dull
1. a ponderous speech