a. dial. [See -FUL.] Endowed with knowledge, well-informed. Hence Knowfulness.

1

1855.  Robinson, Whitby Gloss., s.v., ‘He was skilful and knowful.’ ‘A knowful kind of a body.’

2

1891.  Atkinson, Last of Giant Killers, 140. His canny and knowful counsellor. Ibid., 196. If one had knowfulness and experience enough to comprehend.

3