adjective
ponderous
PON-der-us/ˈpɑːndərəs/
Heavy and slow or awkward in movement.
The movers take ponderous steps as they carry the bulky armchair.

Etymology
The pieces convey being full of weight. Ponderous developed from physical heaviness and the clumsiness it causes to a figurative heaviness of style that can feel tedious.
In context
Slow and ponderous, with each step leaving deep impressions in the clay bank, it emerges from the water.
More examples
- The loaded truck makes a ponderous turn onto the highway.
- The elephant crosses the clearing with a ponderous gait.
- His ponderous speech puts half the audience to sleep.
Forms
ponderous
ponderously adverb — In a heavy, slow, or awkward manner.
ponderousness noun — The quality of being heavy and slow.