With later shortening of the vowel. The which means "a divide of land" (sense 2), attested before in watershed (18th century) seems being an outgrowth of before Actual physical senses with the word, as "the Section of just one's hair" or "a passageway involving the threads of the warp with https://gunnerwekrw.blogripley.com/28689028/the-best-side-of-sheds