The state of being unsure of something.

synonyms: doubt, doubtfulness, dubiety, dubiousness, uncertainty.

Roget 475: uncertainty, incertitude, doubt; doubtfulness etc. adj.; dubiety, dubitation^†, dubitancy^†, dubitousness^†.    hesitation, suspense; perplexity, embarrassment, dilemma, bewilderment; timidity etc. (fear) 860; vacillation etc. 605; diaporesis^†, indetermination.    vagueness etc. adj.; haze, fog; obscurity etc. (darkness) 421; ambiguity etc. (double meaning) 520; contingency, dependence, dependency, double contingency, possibility upon a possibility; open question etc. (question) 461; onus probandi [Lat.]; blind bargain, pig in a poke, leap in the dark, something or other; needle in a haystack, needle in a bottle of hay; roving commission.    precariousness etc. adj.; fallibility.    ... show more

Dutch: aarzeling, onzekerheid, twijfel, weifeling
Polish: obiekcja, wątpliwość, zastrzeżenie