Open to doubt or suspicion; not clearly honest, safe, or reliable. Something that is 'questionable' raises doubts or uncertainties about its validity, integrity, or appropriateness.
It suggests a lack of confidence or trust and often implies a need for further scrutiny or investigation before acceptance or approval.
The degree of doubt can range from minor uncertainty to serious skepticism, depending on the context.
It can also describe something whose moral character or ethical standing is uncertain or morally ambiguous.
IFFY SUSS
FISHY SHADY SHAKY
SUSPECT DUBIOUS SKETCHY
ARGUABLE DOUBTFUL
REFUTABLE UNCERTAIN
SUSPICIOUS CONFUTABLE
CONFUTATIVE
PROBLEMATICAL CONTROVERSIAL