uncertain
un-cer-tain
adjective
Not definitely known, decided, or fixed; subject to change or doubt.
"The future of the company is uncertain."
Thesaurus
Synonyms: doubtful, unsure, incertain, ambivalent, groping, dubious, ambiguous, undependable, unreliable, iffy, up in the air, fluky
Antonyms: certain, certain(p), sealed, sure