effortful
application
arid
assiduity
assiduous
assiduousness
banausic
barren
blah
blank
bloodless
bulldog tenacity
characterless
cold
colorless
concentration
constancy
constant
continuing
dead
diligence
diligent
dim
dismal
dogged
dogged perseverance
doggedness
draggy
drearisome
dreary
drudging
dry
dryasdust
dull
dusty
effete
elephantine
empty
endurance
enduring
engrossment
etiolated
fade
faithful
fidelity
flat
grinding
grubbing
hardworking
heavy
ho-hum
labor
labour
toil
walk
walking
codding
godding
nodding
prodding
rodding