Uncertain :: Uncertain (a.) Not certain; not having certain knowledge; not assured in mind; distrustful.
Uncertain :: Uncertain (a.) Irresolute; inconsonant; variable; untrustworthy; as, an uncertain person; an uncertain breeze..
Uncertain :: Uncertain (a.) Questionable; equivocal; indefinite; problematical.
Uncertain :: Uncertain (a.) Not sure; liable to fall or err; fallible.
Uncertainty :: Uncertainty (n.) The quality or state of being uncertain.
Uncertainty :: Uncertainty (n.) That which is uncertain; something unknown.