dateless
in-situ
timeless
unedited
unmoved
unreduced
unrevised
abiding
changeless
constant
continuing
durable
enduring
firm
fixed
frozen
immobile
immutable
incommutable
inconvertible
indefeasible
inert
insusceptible of change
intact
intransmutable
invariable
inviolate
irretrievable
irreversible
irrevocable
lasting
noble
nonreturnable
nonreversible
permanent
perpetual
persistent
quiescent
remaining
reverseless
rigid
solid
stable
static
stationary
staying
steadfast
sustained
torpid
unalterable
unalterative
unchangeable
unchanged
unchanging
unchecked
undeflectable
defenseless
dissimilar
indestructible
nonexistent
unabridged
unaffected
unassailable
undefended
undiminished
undistinguishable
undisturbed
unharmed
unimpaired
unimpressed
unregulated
unruffled
unshaken
unspoiled
valueless
altered
changed