Synonyms of impossible in English:

impossible


See definition of impossible

adjective

1‘gale force winds made fishing impossible’

SYNONYMS
not possible, beyond the bounds of possibility, out of the question, not worth considering
unfeasible, impractical, impracticable, non-viable, unworkable, beyond one
unthinkable, unimaginable, inconceivable
paradoxical, illogical, irrational
informal undoable, like herding cats
ANTONYMS

possible, easy

2‘six months ago his ambition had seemed an impossible dream’

SYNONYMS
unattainable, unachievable, unobtainable, hopeless, impractical, implausible, far-fetched, impracticable, unworkable
forlorn, vain
incredible, unbelievable, absurd, ludicrous, ridiculous, laughable, risible, preposterous, outlandish, outrageous
wild, hare-brained
ANTONYMS

possible, attainable

3‘a ban on buses would have made life impossible for many residents’

SYNONYMS
unbearable, intolerable, unendurable, unsustainable
informal no-win
ANTONYMS

bearable, tolerable

4‘your mother is the most impossible woman in the world’

SYNONYMS
unmanageable, intractable, recalcitrant, wayward, objectionable, difficult, demanding, awkward, perverse, ungovernable
intolerable, unbearable, unendurable
exasperating, maddening, infuriating
ANTONYMS

manageable, easy to please