Uncertain /(ŭn*sẽr"tĭn)/

Un·cer·tain

Uncertain

a.
  1. Not certain; not having certain knowledge; not assured in mind; distrustful.
    Man, without the protection of a superior Being, . . . is uncertain of everything that he hopes for.
  2. Irresolute; inconsonant; variable; untrustworthy; as, an uncertain person; an uncertain breeze.
    O woman! in our hours of ease, Uncertain, coy, and hard to please!
  3. Questionable; equivocal; indefinite; problematical.
    From certain dangers to uncertain praise.
  4. Not sure; liable to fall or err; fallible.
    Soon bent his bow, uncertain in his aim.
    Whistling slings dismissed the uncertain stone.

Uncertain

v. t.
  1. To make uncertain. [Obs.]