lumbering

nouns

the trade of cutting or preparing or selling timber
lumbering
is a type of (narrower)
the skilled practice of a practical occupation
"he learned his trade as an apprentice"
craft, trade

adjectives

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"
heavy, lumbering, ponderous