uncertainty

noun

1 the uncertainty of the future:

unpredictability, unreliability, riskiness, chanciness, precariousness, unsureness;

changeability, changeableness, variability, inconstancy, fitfulness, fickleness.

▷antonyms certainty, predictability.

2 uncertainty about the future is always bad for morale:

unsureness, lack of certainty, indecision, irresolution, hesitancy, doubt, doubtfulness, wavering, vacillation, equivocation, vagueness, ambivalence, lack of conviction, disquiet, disquietude, wariness, chariness, scepticism;

queries, questions;

rare dubiety, incertitude.

▷antonyms certainty.

3 she pushed the anxious uncertainties out of her mind:

doubt, qualm, misgiving, apprehension, quandary, dilemma, reservation, niggle, scruple, second thought, query, question, question mark, suspicion.

4 there was uncertainty in his voice:

hesitancy, tentativeness, unsureness, lack of confidence, diffidence, doubtfulness, doubt.

▷antonyms confidence.

uncertainty Oxford Dictionary of English