say it: PAHN-dur-uhs
ponderous is an adjective meaning "slow and laborious because of weight". It carries 3 recorded senses.
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”
having great mass and weight and unwieldiness
“a ponderous stone”
“a ponderous burden”
“ponderous weapons”
Definitions, synonyms and semantic relations for ponderous come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.