With afterwards shortening from the vowel. The this means "a divide of land" (feeling two), attested earlier in watershed (18th century) seems to get an outgrowth of before physical senses on the term, as "the A part of just one's hair" or "a passageway between the threads of the warp https://juliustzej29528.wannawiki.com/23544/duramax_shed_the_ultimate_storage_solution_for_your_home