heavily
hea-vi-ly
adverb
To a great extent or degree; intensely or significantly.
"She was heavily involved in the project."
adverb
With great weight or force; in a weighty manner.
"The rain fell heavily all night."
adverb
In a slow, difficult, or laboured way.
"He breathed heavily after the run."
Thesaurus
Synonyms: hard, intemperately, heavy, to a great extent
Antonyms: lightly