assiduously
devotedly
diligently
doggedly
enduringly
faithfully
forbearantly
forbearingly
indefatigably
indulgently
industriously
insistently
leniently
loyally
perseveringly
persistently
persistingly
pertinaciously
philosophically
ploddingly
relentlessly
resolutely
sedulously
sloggingly
stoically
tenaciously
tirelessly
tolerantly
unabatingly
unfalteringly
unflaggingly
unflinchingly
unintermittingly
uninterruptedly
unrelentingly
unremittingly
unrestingly
unsleepingly
unswervingly
untiringly
unwaveringly
unwearyingly
wearilessly
impatiently