Now, it is a well-ascertained and undoubtable fact that the passion of love animates the bosoms of red men as well as white.
There was an undoubtable noise of sawing, and I knew at once that a burglar was entering our home.
For then leaving virtue, it falls into disdained baseness, which is the undoubtable badge of one that will betray society.
She read in this singular alteration of his ways the undoubtable indication of an altered character.
He felt that her undoubtable quality had a non-individual flavour, as if standing for her class.
Was it only his habit in diplomatic affairs to doubt everything that was not undoubtable.
early 13c., "to dread, fear," from Old French doter "doubt, be doubtful; be afraid," from Latin dubitare "to doubt, question, hesitate, waver in opinion" (related to dubius "uncertain;" see dubious), originally "to have to choose between two things."
The sense of "fear" developed in Old French and was passed on to English. Meaning "to be uncertain" is attested in English from c.1300. The -b- was restored 14c. by scribes in imitation of Latin. Replaced Old English tweogan (noun twynung), from tweon "two," on notion of "of two minds" or the choice of two implied in Latin dubitare (cf. German Zweifel "doubt," from zwei "two").
early 13c., from Old French dote (11c.) "fear, dread; doubt," from doter (see doubt (v.)).