usual
abiding
accustomed
acknowledged
addicted
admitted
age-long
aged
ancient
antique
chronic
confirmed
constant
continuing
conventional
customary
deep
deep-dyed
deep-engraven
deep-fixed
deep-grounded
deep-laid
deep-rooted
deep-seated
deep-set
deep-settled
diuturnal
durable
dyed-in-the-wool
embedded
embossed
enduring
engrafted
engraved
entrenched
established
etched
evergreen
fast
firmly established
fixed
folk
graven
habitual
habituated
hallowed
handed down
fanatical
hereditary
implacable
incorrigible
incurable
ineradicable
ingrained
innate
irreconcilable
lifelong
long-standing
malignant
notorious
obstinate
persistent
petty
rancorous
unconquerable
unreasoning
virulent
casual