sticking point
cul-de-sac
job
problem
come to a stop
get into trouble
make hard work of
snorter
toughness
semidesperation
throw down the gauntlet
torrid
hair trigger
catch a cold
uphill
copout
fight out
Dunkirk
hard
fuck
boil the ocean
catch up
hoop
turt
rub along
challengeful
busticate
sprattle
scamblingly
toil
formidability
scrabbly
time to make the donuts
let the grass grow under one's feet
stumbling stone
unequal
tatter
bid
come up with snake eyes
strugglingly
hard-set
outfumble
insecure
megachallenge
baffle
anchorless
put a hurt on
up the ante
howl at the moon
deadpan
women's liberation
hard as nails
winning
ambitious
at a stand
churlish
taxing
get past
brick
get out
flounder
miss stays
wade
rearguard action
pickle
spin one's wheels
tall
square the circle
break
lock horns
wear
blunderous
bust
wear out
dys-
scrape
imperviable
fall apart
push water uphill
up to one's ass in alligators
destabilize
formidable
stumblingblock
superchallenge
death grip
impasse
rigour
cope with
require improvement
waver
destabilise
swamp
deal with
troublous
crack
torfer
doo-doo