ETYMOLOGY
from Latin furibundus (from furere = to rage); the earlier forms through French furibond
EXAMPLE
“… In sayeng the whiche wordes by eneas / dydo lokyng at one side torned hir eyen sodaynli wythout to speke neuer a worde / as a persone furybounde & furyous: and or euer that she coude saye ony thyng. …”
From: “The Boke yf Eneydos, compyled by Vyrgyle, which hathe be translated oute of latyne in to frenshe, and oute of frenshe reduced in to Englysshe by me Wyllm Caxton“
By William Caxton, 1490
Lexicophilia 