ponderous
adjective
1. slow and laborious because of weight
- ponderous prehistoric beasts
- a ponderous yawn
Similar word(s): heavy, lumbering
2. having great mass and weight and unwieldiness
- a ponderous stone
- a ponderous burden
- ponderous weapons
Similar word(s): heavy
3. labored and dull
- a ponderous speech
Similar word(s): uninteresting