lasting
patient
permanent
Spartan
abiding
accepting
adamantine
age-long
aged
alive
ancient
antique
armed with patience
assiduous
bulky
changeless
chronic
constant
continuing
dense
diligent
disciplined
diuturnal
dogged
durable
eidetic
endurant
eternal
evergreen
faithful
firm
fixed
forbearing
fresh
frozen
green
hard
hardy
heavy
immobile
immortal
immutable
inalterable
indefatigable
indomitable
indulgent
industrious
insistent
intact
intransient
inveterate
invincible
During
Turing
alluring
assuring
curing
during
ensuring
insuring
luring
maturing
mooring
obscuring
procuring
reassuring
securing
touring