n. [ LL. certitudo, fr. L. certus: cf. F. certitude. See Certain. ] Freedom from doubt; assurance; certainty. J. H. Newman. [ 1913 Webster ]
n. [ Cf. F. incertitude, LL. incertitudo, fr. L. incertus. See Incertain. ] Uncertainty; doubtfulness; doubt. [ 1913 Webster ]
The incertitude and instability of this life. Holland. [ 1913 Webster ]
He fails . . . from mere incertitude or irresolution. I. Taylor. [ 1913 Webster ]