fastidious

Etymology

It is inherited from Middle English fastidious,^[2][3][4] borrowed from Latin fastīdiōsus (“showing aversion to food, squeamish, exacting, haughty, nauseating”),^[5][6][7][8] perhaps partly through Old French fastidieux or Middle French fastidieux (“disgusting, boring, haughty”), as several dictionaries take it and the OED compares.^{[4][3][2][9][10][5]} The Latin adjective is from fastīdium (“loathing, squeamishness, aversion”), with the suffix -ōsus.^[5][7] The noun is of uncertain origin:^[7] it is usually explained as a contraction of a compound *fastu-taidiom or *fastutīdium,^[9][7][11] from fastus (“contempt, arrogance, pride”) and taedium (“aversion, disgust”), the source of tedium,^{[9][7][12][13]} and Merriam-Webster calls it an irregular formation.^[3] The first element may be related to fastīgium (“top, peak”),^[9][3][12] and Etymonline reports a possible origin in Proto-Indo-European *bhars- (“projection, bristle, point”), about which de Vaan has doubts.^[7] Partridge derives the Scots verb fash from the same Latin family.^[10]

Earliest recorded meaning

Causing distaste or disgust: about 1425, in the Book of Foundation of St Bartholomew's, which has fastidious owtbrekyngis.^[5][2] Etymonline and Barnhart give "haughty, full of pride" as the first sense, from the translation of Higden's Polychronicon,^[7][9] which the OED dates to before 1475.^[5]

Semantic evolution

The word first looked in two directions, as Etymonline says of its early passive and active uses.^[7] Trench and Weekley note that it was applied both to what provokes disgust and to whoever feels it, and Trench quotes Elyot's The Governor for the older use: That thing for the which children be oftentimes beaten, is to them ever after fastidious.^[14][15] That objective sense died out after 1744, and the subjective one, feeling aversion, is recorded from before 1535 to 1631.^[5] The sense "haughty" is now archaic and rare.^[5] Exacting attention to refinement in taste or propriety appears about 1555 in the revised OED,^[5] while Barnhart and Etymonline date "squeamish, hard to please" to the 1610s,^[9][7] and the Oxford Dictionary of English places the current senses in the 17th century.^[16] Johnson (1755) still gathered it all under "disdainful; squeamish; delicate to a vice; insolently nice".^[17] Applied to things, the meaning "scrupulously neat and clean" follows in 1847,^[5] and in biology since 1840 it has described an organism with exacting requirements, difficult to cultivate.^[5]

Timeline

• c. 1425 – causing distaste or disgust; wearisome (obsolete by 1744).^[5][2]
• before 1475 – haughty, disdainful (now archaic and rare).^[5][2]
• before 1535 – feeling distaste or disgust (obsolete by 1631).^[5]
• c. 1555 – minutely concerned with refinement in taste or propriety; exacting.^[5] Barnhart dates the sense "easily disgusted, hard to please" to 1612–15.^[9]
• 1638 – of a thing, stately or imposing, in Herbert (obsolete).^[5]
• 1840 – in biology, having exacting requirements.^[5]
• 1847 – showing care for neatness and cleanliness.^[5]

Meanings

Adjective

1. Showing careful attention to detail; meticulous: a fastidious editor.^[4][3][5]
2. Hard to please; very critical, especially in matters of taste: The hotel's guests were fastidious about the wine.^[18][4][3]
3. Very sensitive to anything unclean or improper; easily disgusted; squeamish.^[18][4][6]
4. Scrupulously neat and clean, or resulting from such care.^[5]
5. (biology) Of an organism, having exacting nutritional or environmental needs and so difficult to cultivate.^[5]
6. (archaic) Haughty, disdainful.^[5][2][3]
7. (obsolete, 1425–1744) Causing distaste or disgust; wearisome.^[5][6][2]

Word family

• fastidiously
• fastidiousness
• hyperfastidious
• nonfastidious
• overfastidious
• ultrafastidious
• unfastidious

Related words

• tedium
• fash

References

1. ^ Wiktionary, the free dictionary, https://en.wiktionary.org
2. ^ a b c d e f g 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)
3. ^ a b c d e f g Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
4. ^ a b c d e The American Heritage Dictionary of the English Language (online 2024), 5th ed., Boston: Houghton Mifflin Harcourt
5. ^ a b c d e f g h i j k l m n o p q r s t u v Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
6. ^ a b c Shorter Oxford English Dictionary on Historical Principles (2002), 5th ed., ed. William R. Trumble and Angus Stevenson, Oxford: Oxford University Press
7. ^ a b c d e f g h i Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
8. ^ Hoad, T. F., ed. (1986), The Concise Oxford Dictionary of English Etymology, Oxford: Clarendon Press
9. ^ a b c d e f g Barnhart, Robert K. (1988), The Barnhart Dictionary of Etymology
10. ^ a b Partridge, Eric (1966), Origins: A Short Etymological Dictionary of Modern English, 4th ed., London: Routledge & Kegan Paul
11. ^ Dictionary.com Unabridged (2016), based on the Random House Unabridged Dictionary, New York: Random House
12. ^ a b Klein, Ernest. A Comprehensive Etymological Dictionary of the English Language. 2 vols. Amsterdam: Elsevier, 1966–1967.
13. ^ Skeat, Walter W. (1911), A Concise Etymological Dictionary of the English Language, new ed., Oxford: Clarendon Press
14. ^ Trench, Richard Chenevix (1859), A Select Glossary of English Words Used Formerly in Senses Different from Their Present, London: John W. Parker
15. ^ Weekley, Ernest (1921), An Etymological Dictionary of Modern English, London: John Murray
16. ^ Stevenson, Angus, ed. (2010), Oxford Dictionary of English, 3rd ed., Oxford: Oxford University Press
17. ^ Johnson, Samuel (1755), A Dictionary of the English Language, London; 4th ed. 1773; Johnson's Dictionary Online, ed. Beth Rapp Young et al.
18. ^ a b Collins English Dictionary (2023), Glasgow: HarperCollins