Collen-ferhtan

According to the Old English Dictionary:

collen-ferhtan

p. -ferhte; pp. -ferhted To make empty or void, render desolate; exinanire :-- Ða ðe cweðaþ, ge collenferhtaþ oððe aídliaþ óþ grundweal oððe to staðolfæstnunga on hire qui dicunt, exinanite, exinanite usque ad fundamentum in ea, Ps. Lamb. 136, 7. collen-ferhtan