n. [ Pref. in- not + certain: cf. F. incertain, L. incertus. See Certain. ] Uncertain; doubtful; unsteady. -- In*cer"tain*ly, adv. [1913 Webster]
Very questionable and of uncertain truth. Sir T. Browne. [1913 Webster]
n. Uncertainty. [ Obs. ] Shak. [ 1913 Webster ]