ineradicable
absorbing
acute
colorfast
constant
deathless
deep
deep-dyed
deep-felt
deepgoing
double-dyed
dyed-in-the-wool
enduring
fadeless
fast
fixed
haunting
heartfelt
homefelt
immortal
imperishable
impregnable
incorruptible
indestructible
ineffaceable
inexpugnable
inextinguishable
ingrain
ingrained
invincible
invulnerable
keen
lasting
nagging
nonperishable
obsessive
penetrating
permanent
persistent
pervading
piercing
poignant
profound
quenchless
recurrent
blotchy
crime-scene
everlasting
felt-tip
fluorescent
gruesome
hieroglyphic
indisputable
indistinct
legible
posthumous
recognizable
runic
sepia
telltale
unchangeable
undying
unfading
unmerited
unmistakable
vivid