I. rounceval adjective
Etymology: from Rouncesvalles, Roncevaux, mountain pass in northern Spain; from the gigantic bones shown there as those of the paladins of Charlemagne slain in battle in 778
obsolete : huge , large
II. roun·ce·val ˈrau̇n(t)səvəl noun
( -s )
1. obsolete
a. : something very large : giant , monster
b. : a big loud woman : virago
2. : marrowfat 1