Firwit-ness

According to the Old English Dictionary:

firwit-ness

Take here fyrwitnes in Dict. , and add :-- Ferwetnes curiositas, Wrt. Voc. ii. 137, 56. Fyrewitnesse (feortwitnysse. Hpt. Gl. 429, 43) ardoris (cf. Hy. S. 14, 30 under firwit), An. Ox. 975. firwit-ness