Sealt-ærn

According to the Old English Dictionary:

-ern, es;

sealt-ærn

n. A salt-house, a place where salt is prepared:--.i. sealtern, Cod. Dip. Kmbl. ii. 64, 28. Bútan ðem sealtern and bútan ðem wioda ðe tó ðem sealtern limpþ, 66, 22. Sealtearn, iii. 426, 19. sealt-ærn