slough

definition: any outer covering that can be shed or cast off (such as the cast-off skin of a snake)
example:
speech part: noun
synonyms:
definition: a stagnant swamp (especially as part of a bayou)
example:
speech part: noun
synonyms:
definition: a hollow filled with mud
example:
speech part: noun
synonyms:
definition: necrotic tissue
example:
speech part: noun
synonyms: gangrene sphacelus
definition: cast off hair, skin, horn, or feathers
example:
speech part: verb
synonyms: shed

How slough is being used?