Added 9 October 2026 questionable /ˈkwɛst͡ʃənəbl̩/ adjective Categories: Describing WordsUncommon Words adjective ! Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about questionable at Wordnik → Where our words come from → Problematic; open to doubt or challenge. It is questionable if the universe is open or closed. Of dubious respectability or morality. Inviting questions; inviting inquiry. Related Words: dubiousproblematicaldoubtfuldubitablesuspectsuspiciousequivocalimpugnabledeniabledebatableproblematicrefutable Back to today's word