QUES'TIONABLE, adjective

1. That may be questioned; doubtful; uncertain; disputable. the deed is of questionable authority.

It is questionable whether Galen ever saw the dissection of a human body.

2. Suspicious; liable to be doubted or disputed; liable to suspicion. His veracity is questionable

Thou com'st in such a questionable shape, that I will speak to thee.