Ofer-sleán

According to the Old English Dictionary:

ofer-sleán

to reduce, subdue:-- Ðæt ða munecas furþor restan ðonne healfe niht ðæt seó dæges þigen tófered sý on ðære nihtlícam reste and seó hǽte ðære þigene oferslegen that the monks may rest more than half the night, so that the food of tie day may be distributed through the body in the nightly rest and the heat of the food subdued, R. Ben. 32, 15. ofer-slean