hard going
task
snorter
megachallenge
overchallenge
hard as Chinese algebra
mountainous
fiendish
murderous
harder than Chinese math
superdifficult
mission impossible
torrid
difficult
mean
pull teeth
lightning in a bottle
toughness
ambitious
hard as iron
taxing
challenging
mountain to climb
tall
superchallenge
uphill
hardish
hard-fought
testing
rigour
Herculean
flounder
daunting
semihard
nodus
bring off
Nintendo hard
enmesh
tough
dys-
formidability
complicated
up the ante
heavy lifting
trouble
problem
killer
effortful
mountain
challenge
uneasy
arduous
overtedious
Matterhorn
big
put a hurt on
boil the ocean
tough as nails
everything
rough
grind
praemunire
induration
hard yards
torfer
ultrahard
Sisyphean
hard
pain point
difficulty
eke out
tough as teak
rigmarole
an old dog for a hard road
skittish
come at
struggle
hard sledding
catch a cold
hard times
hard time
pig
situation
bitch
tough nut to crack
overhard
rub
with difficulty
hard nut to crack
three-pipe problem
rough sledding
doo-doo
get into trouble
hard as Chinese algebra
mountainous
fiendish
murderous
harder than Chinese math
superdifficult
torrid
difficult
mean
ambitious
hard as iron
taxing
challenging
tall
uphill
hardish
hard-fought
testing
Herculean
daunting
semihard
Nintendo hard
tough
complicated
effortful
uneasy
arduous
overtedious
tough as nails
rough
ultrahard
Sisyphean
tough as teak
skittish
hard
overhard
big
uphill
hard
task
snorter
megachallenge
overchallenge
mission impossible
lightning in a bottle
toughness
mountain to climb
superchallenge
rigour
nodus
formidability
heavy lifting
trouble
problem
killer
mountain
challenge
grind
praemunire
induration
hard yards
torfer
pain point
difficulty
rigmarole
struggle
hard sledding
hard times
hard time
pig
situation
bitch
tough nut to crack
rub
hard nut to crack
three-pipe problem
rough sledding
doo-doo
pull teeth
flounder
bring off
enmesh
up the ante
challenge
put a hurt on
boil the ocean
eke out
come at
catch a cold
get into trouble
English words for 'Difficult and requiring a lot of effort.'
As you may have noticed, above you will find words for "Difficult and requiring a lot of effort.". Hover the mouse over the word you'd like to know more about to view its definition. Click 
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