long as one's arm
superlong
far
ultralong
forever
years
crow's age
light year
coon's age
macro-
dolicho-
blue moon
grip
ages
age
donkey's
dragging
overlong
hyperextended
longish
long
indestructible
durable
undestroyable
dog's age
perdurable
eternity
at length
sesquipedalian
inveterately
longwhiles
mecocephalic
until the cows come home
overkeep
sesquipedalianism
until the cows freeze over
prolongedly
with ages
overprotracted
extralong
stretch
forever and a day
period
eon
lifetime
hot minute
interminable
eternal
endless
imperishable