lumbering

Adjective

• 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
    

Noun

• the trade of cutting or preparing or selling timber

Related words

• Synonyms: 
  heavy , ponderous