Synonyms of undecided in English:

undecided


See US English definition of undecided

See UK English definition of undecided

See Spanish definition of indeciso

adjective

1‘her father's fate was still undecided’

SYNONYMS
unresolved, yet to be decided, uncertain, unsure, unclear, unsettled, indefinite
undetermined, indeterminate, unknown, unestablished, unascertained, pending, outstanding, in the balance, up in the air, debatable, arguable, disputable, moot, problematic, controversial, open to question, open to doubt, open, doubtful, dubious, borderline, ambiguous, vague
informal iffy, on the back burner, on ice
British informal dodgy
ANTONYMS

decided, sealed

2‘they remained undecided as to the precise role for the EC’

SYNONYMS
unsure, uncertain, doubtful, dubious, unresolved, indecisive, irresolute, hesitant, tentative, wavering, vacillating, oscillating, equivocating, dithering, uncommitted, floating, shilly-shallying, wobbling, vague, hazy, unclear, ambivalent, in two minds, torn, split
in a quandary, in a dilemma, on the horns of a dilemma, in doubt
informal iffy, blowing hot and cold, on the fence
ANTONYMS

certain