lacking boldness or confidence
unafraid, secure, untroubled
English Synonyms and Antonyms
Uncertain is applied to things that human knowledge can not certainly determine or that human power can not certainly control; precarious originally meant dependent on the will of another, and now, by extension of meaning, dependent on chance or hazard, with manifest unfavorable possibility verging toward probability; as, one holds office by a precarious tenure, or land by a precarious title; the strong man's hold on life is uncertain, the invalid's is precarious.
doubtful, dubious, equivocal, hazardous, insecure, perilous, precarious, risky, uncertain, unsettled, unstable, unsteady
actual, assured, certain, firm, immutable, incontestable, infallible, real, settled, stable, steady, strong, sure, undeniable, undoubted, unquestionable