For-þwyrftan (-þwyrtan)

According to the Old English Dictionary:

for-þwyrftan (-þwyrtan)

to cut off, cut down; obtruncare :-- Forþwyrtan obtruncasse, An. Ox. 5028. Fortþerty ( = forþwyrte) obtruncati, 11, 75. Hí man forðwyrftum limum tó wæfersýne tucode, Hml. S. 28, 128. for-þwyrftan -þwyrtan