Seáða

According to the Old English Dictionary:

an;

seáða

m. 'A feeling as if the cavity of the body were full of water swaying about,' Cockayne. The word glosses tendiculum, Wrt. Voc. ii. 77, 3:--Wið seáðan (seádan, 4, 18), Lchdm. ii. 56, 10. seaða