Synonyms and related words :
ambitendent, ambivalent, arguable, at loose ends, capricious, changeable, debatable, double-minded, dubious, faltering, fence-sitting, fence-straddling, fickle, hesitant, hesitating, indecisive, indefinite, infirm of purpose, irresolute, irresolved, mercurial, moot, mugwumpian, mugwumpish, mutable, of two minds, open, open to question, pending, problematical, questionable, shilly-shally, unanswered, uncertain, undecided, undetermined, unsettled, unsolved, unsure, vacillating, vague, wavering