Slough (hydrology)
WordNet
noun
(1) Any outer covering that can be shed or cast off (such as the cast-off skin of a snake)
(2) A stagnant swamp (especially as part of a bayou)
(3) A hollow filled with mud
(4) Necrotic tissue; a mortified or gangrenous part or mass
verb
(5) Cast off hair, skin, horn, or feathers
"Our dog sheds every Spring"