sheath 
/ˈʃi:θ/ noun
plural sheaths /ˈʃi:θ/ noun /ˈʃi:ðz/ [count] 1 : a cover for the blade of a knife, sword, etc.
▪ the sheath of a sword 2 : a protective covering
▪ a piece of wire covered with a plastic sheath ▪ a nerve sheath 3 Brit : condom 4 : a close-fitting dress that does not usually have a belt
▪ the sheath of a sword
▪ a piece of wire covered with a plastic sheath ▪ a nerve sheath
