Synonyms of uncertain in English:

uncertain


See definition of uncertain

adjective

1‘the environmental effects of the project are uncertain’

SYNONYMS

unknown, undetermined, unsettled, unresolved, unsure, pending, in the balance, in limbo, up in the air, debatable, open to question, in doubt

unpredictable, unforeseeable, incalculable, speculative

unreliable, untrustworthy, undependable, risky, chancy

informal dicey, hairy, iffy

British informal dodgy

ANTONYMS

certain, settled, predictable

2‘the uncertain weather meant that passengers needed to pack a pullover or two’

SYNONYMS

changeable, variable, varying, irregular, fitful, unpredictable, unreliable, unsettled, unstable, erratic, fluctuating

rare changeful, fluctuant

3‘Edward was a little uncertain about the decision’

SYNONYMS

unsure, doubtful, dubious, undecided, unresolved, indecisive, irresolute, hesitant, wavering, vacillating, oscillating, equivocating, vague, hazy, unclear, ambivalent, in two minds, on the horns of a dilemma, torn

informal iffy, blowing hot and cold, on the fence

ANTONYMS

certain, sure

4‘I gave her an uncertain smile’

SYNONYMS

hesitant, hesitating, tentative, halting, faltering, unsure, unconfident, diffident, doubtful

ANTONYMS

confident