Eorþ-fæst
Bosworth & Toller Anglo-Saxon Old English Dictionary - eorþ-fæst
According to the Old English Dictionary:
-fest;
- eorþ-fæst
- adj. Earth-fast, fixed in the earth; in terra firmus :-- To ánum [MS. ane] eorþfestum treówe to a tree firm in the earth. Th. Anlct. 122, 10. eorþ-fæst