Searu-wundor
Bosworth & Toller Anglo-Saxon Old English Dictionary - searu-wundor
According to the Old English Dictionary:
es;
- searu-wundor
- n. A wonderful thing in implements or engines (IV, and cf. searu-píl. The term is applied to Grendel's arm, which had been torn away by Beowulf):--Eode scealc monig searowundor seón, Beo. Th. 1844; B. 920. searu-wundor