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Spiculose
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Thesaurus
Herculean
abstruse
acanaceous
acanthoid
aciculate
aculeolate
arduous
barbed
barbellate
brambly
briery
bristly
brutal
complex
complicated
controversial
critical
delicate
demanding
difficile
difficult
exacting
formidable
hairy
hard
hard-earned
hard-fought
intricate
involved
jawbreaking
knotted
knotty
laborious
mean
muricate
nasty
nettlesome
no picnic
not easy
operose
painful
pricking
prickly
pricky
problematic
rigorous
rough
rugged
set with thorns
setaceous
setose
severe
spiculate
spiculose
spiked
spinous
spiny
steep
sticky
stinging
strenuous
tangled
thistly
ticklish
toilsome
tough
tricky
troublesome
uphill
vexatious
wicked
worrying
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