Þorf-fæst

According to the Old English Dictionary:

þorf-fæst

adj. Useful :-- Ne on eorðo ne in feltúne l on mixenne ðor[f]fæst is neque in terram neque in sterculinium utile est, Lk. Skt. Rush. Lind. 14, 35. Ðor[f]fæst utilis, Rtl. 192, 7. Sié ðor[f]fæsta ús prosint nobis, 91, 27. [Cf. All þatt hemm wass purrfe, Orm. 9628. Icel. þurf--samr helping.] Cf. þearf, V, þearf-líc, II, and next word. þorf-fæst