vague

Synonyms: ambiguous amorphous amphibological bewildering bleary blurred cloudy dark dim doubtful dreamlike dubious enigmatic equivocal faint fuzzy generalized hazy ill-defined impalpable imprecise indefinite indeterminate indistinct inexplicable lax loose misunderstood muddy nebulous obscure perplexing problematic puzzling questionable shadowy superficial tenebrous uncertain unclear undetermined unexplicit unintelligible unknown unsettled unspecified unsure

Antonyms: certain clear definite sure