From Wiktionary, the free dictionary
From ful- (“full”) + wīte (“fine, punishment”)
fulwīte n
- a full fine
- Laws of King Ine
Ðonne mon bēam on wuda forbǣrne, ⁊ weorðe yppe on þone ðe hit dȳde, ġielde hē fulwīte: ġeselle LX sċill., forþamþe fȳr bið þēof.- If a man burns up a tree in a forest, and it becomes known who did it, he shall pay a full fine: he shall pay sixty shillings, for fire is a thief.