strenuously

synonyms

actively

animatedly

ardently

arduously

assiduously

bec et ongles

briskly

con brio

difficultly

diligently

effortfully

energetically

fervently

forcefully

forcibly

hammer and tongs

hard

hardly

heart and soul

heartily

indefatigably

industriously

intensely

keenly

laboriously

lustily

manfully

operosely

painfully

relentlessly

sedulously

spiritedly

the hard way

tirelessly

toilsomely

tooth and nail

unsparingly

vehemently

vigorously

vivaciously

with a will

with difficulty

with effort

with much ado

with pep

zealously

zestfully