On-sǽgan

According to the Old English Dictionary:

on-sǽgan

to cause to sink down, to prostrate:--Ǽrðon hine deáþ onsǽgde, Exon. Th. 171, 32; Gú. 1135. Hú hí (hell) bútan ende éce stondeþ, ðæm ðe ðǽr for his synnum onsǽgd weorþeþ, 446, 27; Dóm. 28. Selegesceotu synd onsǽgd (?), Ps. Th. 82, 6. on-sægan