questionable
/ˈkwɛst͡ʃənəbl̩/ adjective B2- Problematic; open to doubt or challenge. · It is questionable if the universe is open or closed.
- Of dubious respectability or morality.
From the library
I have always felt that there was something singular and questionable in this man’s character, but the adventure of last night brings all my suspicions to a head.
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