indubitable

v. t. [ L. indubitatus, p. p. of indubitare; pref. in- in + dubitare to doubt. ] To bring into doubt; to cause to be doubted. [ Obs. ] [ 1913 Webster ]

To conceal, or indubitate, his exigency. Sir T. Browne. [ 1913 Webster ]

a. [ L. indubitabilis: cf. F. indubitable. See In- not, and Dubitable. ] Not dubitable or doubtful; too evident to admit of doubt; unquestionable; evident; apparently certain; as, an indubitable conclusion. -- n. That which is indubitable.

Syn. -- Unquestionable; evident; incontrovertible; incontestable; undeniable; irrefragable. [ 1913 Webster ]