long
longtime
age-old
bipartisan
centuries-old
constitutional
deep-seated
dynastic
eight-year
factional
ideological
immigration
institutional
interpersonal
intertribal
inveterate
irreconcilable
joint-service
lifelong
long-cherished
long-established
long-running
long-simmering
marital
methodological
ongoing
pharisaic
pregnancy-induced
psychoanalytic
rebels'
residents'
same-sex
sectarian
sectional
societal
unresolved
unspoken
well-founded