impossible
im-pos-si-ble
adjective
Not able to be done or happen; beyond all possibility or capability.
"It's impossible to finish this today."
Thesaurus
Synonyms: intolerable, unacceptable, unbearable, unendurable, infeasible, hopeless, unworkable, unachievable, unrealizable, undoable, impracticable, unfeasible
Antonyms: possible