demanding
exact
Herculean
Siberian
abstruse
accurate
acid
acidulous
acrid
acrimonious
acute
adamant
adamantine
adverse
algid
antagonistic
arctic
arduous
ascetic
astringent
attentive
austere
below zero
biting
bitter
bitterly cold
bleak
boreal
brisk
brumal
brutal
burdensome
cast-iron
caustic
close
cold
cold as charity
cold as death
cold as ice
cold as marble
complex
conflicting
conscientious
constant
contrary
correct
counter
counteractive
crisp
critical
cutting
delicate
arbitrary
ethical
intensive
mathematical
ongoing
painstaking
scrupulous
strenuous
strict
stringent
systematic
vigorous