With afterwards shortening from the vowel. The indicating "a divide of land" (sense 2), attested previously in watershed (18th century) seems to become an outgrowth of before Actual physical senses from the word, as "the A part of one particular's hair" or "a passageway amongst the threads of a warp https://juliustzej29528.wannawiki.com/23544/duramax_shed_the_ultimate_storage_solution_for_your_home