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" Map Each Word Into a Connected Network Audit Your Own Writing for Lexical Resource Force Contrast Between Two Similar Words 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