Þreá-weorc

According to the Old English Dictionary:

es;

þreá-weorc

n. Pain inflicted as a punishment, used of the misery of hell, as in O. Sax. the phrase thrá-werk tholón :-- Wit hearmas, þreáweorc þoliaþ, and þýstre land, Cd. Th. 45, 35; Gen. 737. þrea-weorc