adverbs
to a considerable degree
"he relied heavily on others' data"
in a heavy-footed manner
"he walked heavily up the three flights to his room"
with great force
"she hit her arm heavily against the wall"
in a manner designed for heavy duty
"a heavily constructed car"; "heavily armed"
slowly as if burdened by much weight
"time hung heavy on their hands"
in a labored manner
"he breathed heavily"
indulging excessively
"he drank heavily"