knightfullyadv.
Etymology: compare manfully.Previous versions of the OED give the stress as: ˈknightfully.
the mind > emotion > courage > chivalry > [adverb]
1845 Neale 82 Gallantly and knightfully They toil'd the live-long day.
This entry has not yet been fully updated (first published 1901; most recently modified version published online June 2021).