Ge-fæstnian

According to the Old English Dictionary:

ge-fæstnian

p. ode, ade; pp. od, ad To fix, fasten, secure, confirm, betroth; figere, firmare, confirmare, infigere, despondere :-- Iulius him mid gewritum gefæstnod Julius secured it to him by writings, Ors. 5, 13; Bos. 112, 31. Gefæstnade secured, Bd. 1, 5; S. 476, 10. Gefæstnode, 4, 28; S. 605, 24. Gefæstnode synd þeóda infixæ sunt gentes, Ps. Spl. 9,15. Gifæstnad desponsata, Lk. Skt. Rush. 1, 27. ge-fæstnian