sheath

Etymology

It is inherited from Middle English shethe, also schethe,^[2][3][4] inherited from Old English scēaþ, also scǣþ, a strong feminine noun meaning a sheath or scabbard,^[5][6][7] from Proto-Germanic *skaiþiz.^{[8][9][10][11]} It is cognate with Old Saxon skēðia, Old Frisian skēthe, Middle Dutch schēde, Old High German sceida, German Scheide, Dutch schede, Danish skede and Old Norse skeiðir, a plural noun meaning scabbard.^{[5][9][2][8][4]} The Germanic noun probably comes from the base Proto-Germanic *skaiþ- (“to divide, separate”), the source of the verb shed,^[9][5][7][4] and Klein takes the original meaning to have been "something separating".^[4] The OED and Ayto suggest that a sheath was first a stick split open to take a blade, comparing Swedish skida (“a sheath”), apparently the same word as Old Norse skíða (“a billet of wood”), the source of shide.^[5][11] Etymonline derives the base from an extended form of Proto-Indo-European *skei- (“to cut, split”),^[2][3] and Merriam-Webster compares Latin scindō (“to split”).^[12] The OED thinks the likeness of Old Norse skauðir, the sheath of a horse, is probably accidental.^[5]

Earliest recorded meaning

A case for the blade of a sword: in Old English, in the Lindisfarne Gospels (John 18:11),^[5] which Barnhart dates about 950.^[8] Bosworth–Toller records it glossing Latin vāgīna and in the poem Judith, where swords are drawn of sceáþum.^[6] Barnhart finds the Middle English forms shæthe probably about 1200 and sheeth about 1250.^[8]

Semantic evolution

From 1297, in Robert of Gloucester's chronicle, the word was used in transferred and figurative senses,^[5] and Etymonline finds it extended to any similar tube-like covering by the 1550s.^[2] Chaucer used it four times.^[13] In the 16th century by my sheath was a petty oath (1532–34) and a painted sheath a showy exterior (1542–1614).^[5] The natural sciences then took it up: the fold of skin into which an animal's penis is drawn back (1555), a tubular part of a plant (1672), the covering of an insect's sting or of a hair (1774), the connective tissue around an organ (1805) and a beetle's wing case (1826).^[5] Johnson (1755) defined it as "the case of any thing; the scabbard of a weapon".^[14] A condom was called a sheath from 1861 and a close-fitting dress from 1904.^[2] In Scots and northern English dialect a sheath was also a holder for the end of a knitting needle, fastened at the waist.^[15]

Timeline

• c. 950 – a case for a blade, in the Lindisfarne Gospels.^[5][8]
• c. 1200 – Middle English shæthe, and sheeth about 1250.^[8]
• 1297 – transferred and figurative uses.^[5]
• 1532 – by my sheath, a petty oath (to 1534).^[5]
• 1542 – painted sheath, a showy exterior (to 1614).^[5]
• 1555 – the fold of skin around an animal's penis.^[5]
• 1672 – in botany, a tubular part of a plant.^[5]
• 1805 – in anatomy, the connective tissue around an organ.^[5]
• 1826 – the hard wing case of a beetle.^[5]
• 1861 – a condom.^[2]
• 1904 – a close-fitting dress.^[2]

Meanings

Noun

1. A close-fitting case for the blade of a sword, knife or similar tool; a scabbard: He slid the dagger back into its sheath.^[16][17][18]
2. Any similar close-fitting covering.^[16][18]
3. (biology) An enclosing tubular structure, such as the base of a grass leaf around the stem, or the tissue around a muscle or nerve fibre.^[18][16][17]
4. The fold of skin into which the penis of many mammals is drawn back.^[17][5]
5. The protective outer covering of an electric cable.^[16]
6. A close-fitting dress with a narrow skirt.^[16][18]
7. A condom.^[16][2]

Verb

1. To put into a sheath; to sheathe.^[16][18]

Word family

• sheathless
• sheathlike
• magnetosheath
• sheathbill
• myelin sheath
• medullary sheath
• sheath knife

Related words

• sheathe
• unsheathe
• shed
• shide
• ski

Usage notes

As a verb, sheath is a variant of sheathe.^[16][18] A sheath in old ploughs, the bar joining the beam and the sole, recorded from 1350 to 1817, has a separate source: it is probably a variant of sheth.^[5][19][7]

References

1. ^ a b Wiktionary, the free dictionary, https://en.wiktionary.org
2. ^ a b c d e f g h Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
3. ^ a b The American Heritage Dictionary of the English Language (online 2024), 5th ed., Boston: Houghton Mifflin Harcourt
4. ^ a b c d Klein, Ernest. A Comprehensive Etymological Dictionary of the English Language. 2 vols. Amsterdam: Elsevier, 1966–1967.
5. ^ a b c d e f g h i j k l m n o p q r s Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
6. ^ a b Bosworth, Joseph; Toller, T. Northcote (1898), An Anglo-Saxon Dictionary, Oxford: Clarendon Press; Toller, T. Northcote (1921), Supplement
7. ^ a b c Shorter Oxford English Dictionary on Historical Principles (2002), 5th ed., ed. William R. Trumble and Angus Stevenson, Oxford: Oxford University Press
8. ^ a b c d e f Barnhart, Robert K., ed. (1995), The Barnhart Concise Dictionary of Etymology, New York: HarperCollins
9. ^ a b c Hoad, T. F., ed. (1986), The Concise Oxford Dictionary of English Etymology, Oxford: Clarendon Press
10. ^ Orel, Vladimir (2003), A Handbook of Germanic Etymology, Leiden / Boston: Brill
11. ^ a b Ayto, John (2005), Word Origins: The Secret Histories of English Words from A to Z, 2nd ed., London: A & C Black
12. ^ Merriam-Webster's Collegiate Dictionary (2003), 11th ed., Springfield, Mass.: Merriam-Webster
13. ^ Benson, Larry D., Glossarial Concordance to Middle English (Chaucer, Gower), Johns Hopkins University, github.com/jhu-digital-manuscripts/gcme
14. ^ Johnson, Samuel (1755), A Dictionary of the English Language, London; 4th ed. 1773; Johnson's Dictionary Online, ed. Beth Rapp Young et al.
15. ^ Wright, Joseph, ed. (1898–1905), The English Dialect Dictionary, 6 vols., Oxford: Henry Frowde; via EDD Online 4.0, University of Innsbruck (CC BY 4.0)
16. ^ a b c d e f g h Collins English Dictionary (2023), Glasgow: HarperCollins
17. ^ a b c Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
18. ^ a b c d e f The American Heritage Dictionary of the English Language (1992), 3rd ed., Boston: Houghton Mifflin
19. ^ Kurath, Hans; Kuhn, Sherman M.; Lewis, Robert E., eds. (1952–2001), Middle English Dictionary, Ann Arbor: University of Michigan Press; online edition ed. Frances McSparran et al. (2000–2018)