SHEATH, n.
1. A case for the reception of a sword or other long and slender instrument a scabbard. A sheath is that which separates, and hence a defense.
2. In botany, a membrane investing a stem or branch, as in grasses.
3. Any thin covering for defense the wing-case of an insect.
SHEATH,
The King James Bible has stood its ground for nearly 400 years. However, during that time the English language has changed, and with it the meanings of some words it used. Here are more than 6,500 words whose definitions have changed since 1611.Wikipedia
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