GRE TOEFL IELTS questionable Definition Open to doubt or debate; of uncertain quality or legitimacy. Example "His motives for helping were questionable." Sign in to save GRE Quiz → TOEFL Quiz → IELTS Quiz → ← quest questionnaire → Stories featuring "questionable" Whispers From The Dark Colony Study tips featuring "questionable" Study the Exact Words Examiners Use Group Words Together by Emotional Tone Map Each Word Into a Connected Network Related words GRE awe GRE smithereens GRE abacus SAT abase GRE abash GRE abate GRE abbreviate GRE abbreviation SAT abdicate SAT abdomen GRE abduct GRE aberrant