bloody-minded
bolshy
bullet-headed
bullheaded
cantankerous
contrarious
crossgrained
determined
disobedient
dogged
dour
hardheaded
mulish
persistent
pertinacious
pig-headed
stiff-necked
strong-minded
strong-willed
stroppy
tenacious
unregenerate
unregenerated
unyielding
adamant
adherent
adhesive
adversary
adversative
adverse
alien
antagonistic
anti
antipathetic
antithetic
asinine
assiduous
balking
balky
beefy
bigoted
bouncing
bound
bound and determined
bulldogged
bulldoggish
bulldoggy
bulletheaded
bullish
camelish
case-hardened
clashing
clingy
closed to
closed-minded
committed
competitive
con
conflicting
constant
continuing
contradictory
contrary
contumacious
costive
counter
crabbed
cross
cussed
hang in
hang on
hold on
persevere
persist
aggressive
fierce
headstrong
jealous
perverse
rebellious
reckless
resolute
selfish
stubborn
vindictive
complaisant
manageable
obedient
obliging