continual
obstinate
stubborn
unforgettable
unregenerate
abiding
accordant
adherent
adhesive
age-long
aged
alike
ancient
antique
archaic
assiduous
automatic
balanced
beaten
booming
bound
bound and determined
bulldogged
bulldoggish
bulldoggy
bullheaded
changeless
chronic
clamant
clamorous
clingy
committed
consistent
consonant
constant
continuing
continuous
correspondent
crying
decided
decisive
dedicated
definite
demanding
determined
devoted
diligent
diuturnal
dogged
draining
durable
earnest
persist
persistence
persistently
bold
desperate
insistent
intense
relentless
severe
steady
assistant
distant
existent
inconsistent
nonexistent
resistant
self-consistent
caducous
deciduous