Webster's Revised Unabridged Dictionary · 1913

Indubitate

Indubitate , adjective

[Latin indubitatus; pref. in- not + dubitatus, past participle of dubitare to doubt.]

Not questioned or doubtful; evident; certain. [Obsolete] — Bacon

Indubitate , transitive verb

[Latin indubitatus, past participle of indubitare; pref. in- in + dubitare to doubt.]

To bring into doubt; to cause to be doubted. [Obsolete]
To conceal, or indubitate, his exigency. — Sir T. Browne