seor : silk
The Illunse word for silk is seor. Seor is a rare last name. Seor is the name of a city in Pakistan. In Hebrew (transliterated) seor is leaven, that which is used to produce fermentation in dough, such as yeast.
This word is a mixture of the Old English word for silk which is seolc or seoloc, and the Latin word for silk which is sericum.
There's another Old English word for silk - síde. I'm not sure which word is more common, but seolc looks more like the Modern English word silk.