See Also: undoubtful(dictionary)

on-(4) (iou) and undoubtful (iou)


on-(4) (iou)



on- prefix.
[Unstressed form of Old English an, ON preposition A preposition1. Cf. combs. of ON preposition, ON adjective.]
In various senses of 'on' forming verbs (chiefly obs.), adjectives from pples, verbal nouns & nouns of action (sometimes concrete), as oncoming, onlay, onset; also forming Other types of noun, as on-drive.

undoubtful (iou)



undoubtful adjective. LME.
[from UN-1 + DOUBTFUL.]
Not mixed with or qualified by doubt; firm, sure. LME-E17.
Not doubted, undoubted, certain. M16.
Not feeling doubt; certain (of something). E17.
undoubtfully adverb (rare) E17.
undoubtfulness noun (rare) E17.