doubtful Play adjectiveFeeling uncertain about something. SYNONYMS ambivalentblowing hot and coldditheringdividedfalteringfluctuatinghesitantiffyin a quandary/dilemmain doubtin two mindsindefiniteirresoluteshilly-shallyingsitting on the fenceteeteringtentativeuncertainundecidedundeterminedunresolvedunsurevacillatingwavering