aimlessly
aridly
barrenly
bloodlessly
bootlessly
colorlessly
dismally
draggily
drearily
drearisomely
dryly
dully
dustily
effetely
emptily
fecklessly
fruitlessly
futilely
heavily
hollowly
inanely
insipidly
jejunely
lifelessly
needlessly
pallidly
ploddingly
ponderously
purposelessly
slowly
spiritlessly
stodgily
stuffily
superficially
tastelessly
tediously
to little purpose
to no purpose
uninterestingly
unnecessarily
uselessly
vainly
vapidly