sealed
absolute
beyond recall
beyond remedy
binding
certain
changeless
compulsory
conclusive
constant
cureless
decisive
decretory
dictated
enduring
entailed
established
everlasting
fated
fateful
final
fixed
gone
hard-and-fast
immedicable
immutable
imperative
imposed
incommutable
inconvertible
incorrigible
incurable
indefeasible
ineluctable
inert
inescapable
inevasible
inevitable
inexorable
inflexible
inoperable
insusceptible of change
intransmutable
invariable
irreclaimable
irrecoverable
irredeemable
irreformable
irremediable
irreparable
irrepealable
immediate
impending
incontrovertible
inviolable
irretrievable
irreversible
momentous
unavoidable
unbreakable
unchangeable
unconditional
unequivocal
unhesitating
unqualified
unspoken
revocable