a. dial. [See -FUL.] Endowed with knowledge, well-informed. Hence Knowfulness.
1855. Robinson, Whitby Gloss., s.v., He was skilful and knowful. A knowful kind of a body.
1891. Atkinson, Last of Giant Killers, 140. His canny and knowful counsellor. Ibid., 196. If one had knowfulness and experience enough to comprehend.