sane

Etymology

It is borrowed from Latin sānus (“healthy, sound”),^{[2][3][4][5][6][1]} a word of uncertain origin,^{[7][8][9][10]} related to Umbrian sanes.^[9] Etymonline mentions a derivation from Proto-Indo-European *seh- (“to tie”), which de Vaan calls "purely mechanical", or from a root meaning "to satisfy", as in satis (“enough”);^[7] Weekley thought it ultimately related to sacer (“sacred”).^[11] Barnhart and Etymonline consider that the adjective may instead be a back-formation from sanity or insane, on the model of the Latin word.^[10][7] The Latin adjective is also the source of French sain, Spanish sano, Italian sano and Portuguese são.^[2]

Earliest recorded meaning

Sound, healthy, in the legal phrase of sane memory: 1628, in Coke's Institutes.^[2][10][3] Dictionary.com dates the word to 1620–30.^[12]

Semantic evolution

The OED explains that the word is almost entirely restricted to the sense "mentally sound" because it is used as the opposite of insane, which, like its Latin source insānus, always referred to the mind;^[2][10][11] Ayto points also to the Latin saying mens sana in corpore sano, a healthy mind in a healthy body.^[8] The sense "sound in mind, not mad" is first recorded in 1721, in Bailey's dictionary.^[2][10][7] Johnson (1755) defined it only as "sound; healthy", of the body,^[13] a sense the OED calls rare.^[2] From 1843 it also meant sensible or rational, free of delusions and prejudices.^[2]

Timeline

• 1628 – of sane memory, in law.^[2][10]
• 1721 – of sound mind, not mad, in Bailey's dictionary.^[2][10]
• 1755 – of the body, healthy, in Johnson's dictionary.^[2][13]
• 1843 – sensible, rational.^[2]

Meanings

Adjective

1. Of sound mind; not mentally ill: The court ruled that the defendant was sane.^[14][3][2]
2. Showing good sense; reasonable or sensible: a sane approach to spending.^[14][3][2]
3. (rare or obsolete) Healthy in body.^[14][4][2]

Word family

• sanely
• saneness
• nonsane

Related words

• sanity
• insane
• sanitary
• sanatorium
• sanative

References

1. ^ a b Wiktionary, the free dictionary, https://en.wiktionary.org
2. ^ a b c d e f g h i j k l m n Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
3. ^ a b c d Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
4. ^ a b Shorter Oxford English Dictionary on Historical Principles (2002), 5th ed., ed. William R. Trumble and Angus Stevenson, Oxford: Oxford University Press
5. ^ Stevenson, Angus, ed. (2010), Oxford Dictionary of English, 3rd ed., Oxford: Oxford University Press
6. ^ The American Heritage Dictionary of the English Language (online 2024), 5th ed., Boston: Houghton Mifflin Harcourt
7. ^ a b c d Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
8. ^ a b Ayto, John (2005), Word Origins: The Secret Histories of English Words from A to Z, 2nd ed., London: A & C Black
9. ^ a b Klein, Ernest. A Comprehensive Etymological Dictionary of the English Language. 2 vols. Amsterdam: Elsevier, 1966–1967.
10. ^ a b c d e f g Barnhart, Robert K. (1988), The Barnhart Dictionary of Etymology
11. ^ a b Weekley, Ernest (1921), An Etymological Dictionary of Modern English, London: John Murray
12. ^ Dictionary.com Unabridged (2016), based on the Random House Unabridged Dictionary, New York: Random House
13. ^ a b Johnson, Samuel (1755), A Dictionary of the English Language, London; 4th ed. 1773; Johnson's Dictionary Online, ed. Beth Rapp Young et al.
14. ^ a b c Collins English Dictionary (2023), Glasgow: HarperCollins