les jeux sont faits
unregainable
yesterday is gone
culminate
you can't win them all
exercise in futility
ungainsayable
toothpaste is out of the tube
rearrange the deck chairs on the Titanic
you can't unring a bell
the die is cast
imperfectible
unaccomplishable
what's done is done
last-time
that's the way life is
genie is out of the bottle
unruinable
grandfather paradox
uncomposable
unovercome
Novikov self-consistency principle
unreprievable
hooped
indiminishable
undoable
unrealizable
elusiveness
unachievable
unattainable
unpremeditable
you can't go home again
bootstrap paradox
irrecoverable
unrepentable
out of sight
improvability
no-win situation
conflict
the damage is done
laugh before breakfast, cry before supper
irreparability
inaccessible
uncomeatable
impassable
unmarriageable
unnearable
irrelievable
insuperable
upwards
inadaptability
camel through the eye of a needle
may God have mercy on your soul
irreconcilable
impossible
unattainment
incorrigible
irretraceable
regredience
come to a stop
nonconcluding
unceasable
pastwards
pastward
unsinkable
helplessness
unsuperable
doom
unreachable
unrecuperable
unshiftable
goodnight Vienna
you can't polish a turd
inamissible
inevitabilism
unstanchable
unfulfillable
arrival
inefficacious
smashup
catastrophe
inapplicability
catastrophic
disconsolate
spin one's wheels
clash
disaster
done for
closed time loop
unovercomeable
nonundoable
unfulfillably
unfinishable
nonreversible
underaccomplished
unforeseeable
irremediable
unsufferable
you can't step in the same river twice