lye

Etymology

It is inherited from Middle English lye, also leye and lie,^[2][3] inherited from Old English lēag, later lēah,^[4][5][2][6] inherited from Proto-Germanic *laugō.^{[7][8][9][10]} It is cognate with Middle Dutch lōghe, Dutch loog, Old High German louga and German Lauge, all meaning "lye", and with Old Norse laug (“bath, hot spring”).^{[11][7][8][12][3]} Orel takes the Germanic noun as a suffixed formation related to the PIE root for "to wash", found in Ancient Greek λούω (loúō, “to wash”) and Latin lavō (“to wash”);^[9][3] Etymonline and Wiktionary trace it to the PIE root Proto-Indo-European *lewh₃- (“to wash”).^[7][1][10] The same base is behind lather and, through Latin, lave.^[8][12][13] Because the solution was once used instead of soap, the Old Norse word for a bath gave the Danish and Swedish names for Saturday, Danish lørdag and Swedish lördag, "washing day".^[7][3]

Earliest recorded meaning

Water made alkaline, mainly by soaking vegetable ashes in it: recorded in Old English in the Épinal Glossary,^[4] which Barnhart dates to about 700.^[11] The first Middle English form, leihe, is from before 1300, and lie from before 1400.^[11]

Semantic evolution

Lye made by leaching water through wood ashes was the household detergent before soap was common, and the word widened about 1200 to any cleansing substance, also figuratively.^[4][7] Early Modern English also had chamber-lye for urine used as a detergent,^[7][4] and in the 16th century lye could mean a hair cosmetic.^[4] From 1634 it was used for any water impregnated with salts; earlier, from 1615, it also meant the watery fluid of a blister or of dropsy, a sense the OED records later only in dialect.^[4] In modern use it means especially a strong solution of sodium or potassium hydroxide.^[14][2] English dialects of the Midlands, East Anglia and the South West had compounds such as lye-box and lye-leech for the vessels in which lye was made, and in Devon to lye was to soak clothes in it.^[15] In American drug slang of the 1990s lye also meant marijuana.^[16]

Timeline

• Old English – alkalized water, made by leaching vegetable ashes.^[4][11]
• c. 1200 – any detergent or cleansing substance; also figuratively.^[4]
• before 1500 – urine used as a detergent, chamber-lye.^[4]
• 1556 – a cosmetic for the hair (obsolete by 1561).^[4]
• 1615 – the watery fluid of a blister or of dropsy.^[4]
• 1634 – water impregnated with salts.^[4]
• 1805 – verb, to treat with lye.^[4]

Meanings

Noun

1. A strong alkaline solution, especially of sodium hydroxide or potassium hydroxide, used in making soap and in cleaning: She wore gloves to handle the lye.^[14][2]
2. Any solution obtained by leaching, especially the caustic liquid got by soaking wood ashes in water.^[14][2][4]
3. (rare) Water impregnated with salts.^[4][2]

Verb

1. To treat with lye.^[2][4]

Related words

• lather
• lave
• lavatory

Usage notes

The OED records a separate, obsolete verb lye, to mix or thicken soups and sauces (about 1390 to 1475, in The Forme of Cury), borrowed from French lier (“to bind”), from Latin ligō.^[4]

References

1. ^ a b Wiktionary, the free dictionary, https://en.wiktionary.org
2. ^ a b c d e f g Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
3. ^ a b c d Klein, Ernest. A Comprehensive Etymological Dictionary of the English Language. 2 vols. Amsterdam: Elsevier, 1966–1967.
4. ^ a b c d e f g h i j k l m n o p q Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
5. ^ The American Heritage Dictionary of the English Language (online 2024), 5th ed., Boston: Houghton Mifflin Harcourt
6. ^ Holthausen, Ferdinand (1934), Altenglisches etymologisches Wörterbuch, Heidelberg: Carl Winter
7. ^ a b c d e f Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
8. ^ a b c Hoad, T. F., ed. (1986), The Concise Oxford Dictionary of English Etymology, Oxford: Clarendon Press
9. ^ a b Orel, Vladimir (2003), A Handbook of Germanic Etymology, Leiden / Boston: Brill
10. ^ a b Köbler, Gerhard (2014), Germanisches Wörterbuch, 5th ed., online, koeblergerhard.de/wikiling
11. ^ a b c d Barnhart, Robert K. (1988), The Barnhart Dictionary of Etymology
12. ^ a b Shorter Oxford English Dictionary on Historical Principles (2002), 5th ed., ed. William R. Trumble and Angus Stevenson, Oxford: Oxford University Press
13. ^ Weekley, Ernest (1921), An Etymological Dictionary of Modern English, London: John Murray
14. ^ a b c Collins English Dictionary (2023), Glasgow: HarperCollins
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. ^ Green, Jonathon (2010), Green's Dictionary of Slang, London: Chambers; digital ed. 2016–, https://greensdictofslang.com