Ge-ǣt[t]rian

According to the Old English Dictionary:

ge-ǣt[t]rian

to poison (lit. and fig.). Take Aere ge-ǣtred, and add :-- Ondrǣd þē þone drowend þe geǣttrad mid þām tægle . . . biþ his hiht geǣttrod mid þæs drowendes tægle, Hml. Th. i. 252, 9. Nǣddran fela manna tō deáde geǣttrodon, ii. 238, 12. Wæs ān cnapa geǣttrod þurh nǣddran, 514, 6. ꝥ flǣsc wæs geǣttred mid þȳ werrestan āttre. Shrn. 84, 28. On þā oferhȳda þǣre geǣttredan deófles lāre, Cht. E. 242, 21. Hē mid geǣttrode flān hine ofsceótan wolde, ac seó geǣttrode flā wende ongeán, Hml. Th. i. 502, 18. Geǣttrodre liuida, Germ. 401, 31. Geǣttrodne hlāf. Gr. D. 118, 5. Geǣtredum infectis, Wrt. Voc. ii. 43, 62. ge-ættrian