sheath
noun
°A scabbard; a holster for a sword.
°Anything that has a similar shape to a scabbard for a sword that is for the purpose of holding an object that is longer than it is wide; a case.
verb
°To put an object (especially a weapon, in particular, a sword) into its sheath.
synonyms: scabbard, case, casing, cover more» , covering, envelope