Word family noun question questioning questioner questionnaire adjective questionable ≠ unquestionable questioning ≠ unquestioning unquestioned verb question adverb unquestionably questioningly ≠ unquestioningly
From Longman Dictionary of Contemporary Englishquestionableques‧tion‧a‧ble /ˈkwestʃənəbəl/ ●○○ adjective 1 UNCERTAINnot likely to be true or correct The statistics are highly questionable.it is questionable whether It is questionable whether the taxpayer receives value for money.2 DISHONESTnot likely to be good, honest, or useful I suspected that his motives for helping us were questionable. He was a man of questionable character.Examples from the Corpus
questionable• The value of such a simple dichotomy is questionable.• The picture's value is questionable.• How benign these films are, though, is questionable.• If the lab results are questionable, a patient may be asked to return for another test.• The conclusions of the survey are questionable because the research was based on a very small sample of people.• The research is questionable because the sample used was very small.• There was the questionable decision to bring former Raiders coach Tom Flores out of retirement and back on to the field.• Equally questionable esthetically is the dashboard, which has a look of being pieced together from assorted parts.• His dream had finally run out in an Arabian nightmare of high living and questionable favours.• Barton has been involved in some questionable financial deals.• It seems to me questionable that Ruether is herself theistic.• It is questionable whether the advertisements will increase sales.highly questionable• Such a view seems highly questionable.• The cogency of this prescriptive analysis is highly questionable.• To most people today the prophecy about the second coming seems deranged and the other about everlasting life highly questionable.• However, she makes two highly questionable assumptions that must be challenged.• Now, it happens that is a very controversial and highly questionable economic proposition.• Whether that is so in other societies, which is highly questionable, is irrelevant.• These are, however, highly questionable principles in the moral and practical minefield of child care policy.• In fact, it is highly questionable whether the royal use of these powers had been illegal.From Longman Business Dictionaryquestionableques‧tion‧a‧ble /ˈkwestʃənəbəl/ adjective1not definitely correct or trueLooking back, we did make some questionable decisions.2behaviour or actions that are questionable seem likely to be dishonest or wrongbusiness deals of a rather questionable kind 