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sheath

sheath /ˈʃiːθ/ noun
plural sheaths /ˈʃiːðz/
sheath
/ˈʃiːθ/
noun
plural sheaths /ˈʃiːðz/
Britannica Dictionary definition of SHEATH
[count]
: a cover for the blade of a knife, sword, etc.
: a protective covering
British : condom
: a close-fitting dress that does not usually have a belt