adv. Obs. rare. [f. assumed adj. *witnessful + -LY2.] Evidently, plainly.

1

c. 1374.  Chaucer, Boeth., IV. pr. v. (1868), 131. In þis wise more clerely and more witnesfully [L. testatius, v.r. apertius] is þe office of wise men ytretid.

2