precipitate

Etymology

The verb and the adjective are borrowed from Latin praecipitātus, the past participle of praecipitō (“to throw or fall headlong; to hasten, to rush”),^[2][3][4] from praeceps (“headlong, steep”), genitive praecipitis,^[5][6] which is formed from prae (“before”) and caput (“head”),^[5][7][8][9] from Proto-Indo-European *kaput- (“head”).^[5][7] By the 6th century the participle was also used as an adjective meaning hasty or rash.^[2] Barnhart takes the verb as probably a back-formation from the earlier noun precipitation, perhaps influenced in some uses by the participle,^[6] and Etymonline allows either origin.^[5] The chemical noun took its own route: it is borrowed from New Latin praecipitātum, the neuter of the same participle used as a noun.^[3][4][8][2] The OED, which calls that form post-classical, compares Medieval Latin mercurius precipitatus of the late 12th or early 13th century, Middle French precipite and French précipité of 1553.^[2] Barnhart and Etymonline instead take the noun as a back-formation from precipitation.^[6][5]

Earliest recorded meaning

To throw a person suddenly or violently into a condition, especially a bad one: 1528, in S. Gardiner, printed in Pocock's Records of Reformation.^[2] Barnhart and Merriam-Webster date the verb to the same year,^[6][3] and Etymonline also notes that the earliest English use is figurative.^[5]

Semantic evolution

The Oxford dictionaries trace the verb from "hurl down, send violently" through "cause to move rapidly" to the common modern sense of bringing something on.^[10][11] The literal casting down of a person is recorded in 1541,^[2] a little after the figurative use, and the OED also finds the sense of hastening an event as early as 1557,^[2] well before the 1620s date in Barnhart and Etymonline.^[6][5] The steep drop as a picture of rapid or downward movement belongs to a wider pattern of describing movement in terms of high land, in place since the first half of the 16th century.^[12]

The adjective first meant hasty or rash, of an action or judgement (1545),^[2][3] though Barnhart dates this to 1607 and Etymonline to about 1600.^[6][5] It was soon applied to physical descent as well: to what falls steeply (1614, in Raleigh) and to steep land (1615).^[2] Johnson (1755) still listed "steeply falling" before "headlong; hasty; rashly hasty".^[13] The American Heritage Dictionary notes that the adjective has since moved away from steepness and now describes mainly rash actions.^[7]

In post-classical times the Latin verb was used for depositing a solid from a solution, before 1490,^[2] and the English noun precipitation had the same sense in alchemy about 1477.^[6][5] The noun first named solid mercury compounds (1563),^[2] which is why Johnson defined it as a corrosive medicine made by precipitating mercury.^[13] The wider sense, any substance separated out of a solution, followed in 1594.^[2][3] American regional speech altered red precipitate to red percipity, rubbed into the scalp as of the 1880s, and red pacifity, a salve against head lice, recorded in 1967.^[14] The intransitive verb is recorded in the chemical sense before 1626, in Bacon, and the transitive in 1644, in Digby,^[2] while Etymonline gives the reverse order.^[5] Atmospheric moisture came later: the OED has the verb in this use from 1796^[2] and the noun from 1832,^[2][6][5] and Etymonline dates the meteorological verb only to 1863.^[5] The figurative noun, something produced as if by such a process, is recorded from 1816.^[2]

Timeline

• 1528 – verb, to throw a person suddenly into a state or condition.^[2]
• 1541 – verb, to cast down, to throw over a precipice.^[2]
• 1545 – adjective, excessively hasty, rash.^[2][3] Barnhart dates it to 1607.^[6]
• 1557 – verb, to cause an event to happen suddenly.^[2] Barnhart dates it to 1625.^[6]
• 1563 – noun, a solid mercury compound formed by precipitation.^[2][6]
• 1594 – noun, any substance separated from a solution.^[2][3]
• 1608 – verb, intransitive, to fall headlong, in Shakespeare's King Lear.^[2]
• 1615 – adjective, of land, very steep.^[2]
• before 1626 – verb, intransitive, to be deposited as a solid from solution.^[2][6]
• 1644 – verb, transitive, to cause a substance to be deposited from solution.^[2]
• 1658 – adjective, very sudden or abrupt.^[2][6]
• 1796 – verb, of water vapour, to condense and fall.^[2]
• 1816 – noun, figurative, a by-product of some process.^[2]
• 1832 – noun, moisture condensed from vapour and falling as rain or dew.^[2][6][5]

Meanings

Verb

1. To cause something, often a crisis, to happen suddenly, unexpectedly or too soon: The bank's failure precipitated a wider panic.^{[7][15][3][2]}
2. To put someone suddenly into a particular state, especially a bad one.^[7][2]
3. To throw down from a height, or to fling oneself down or forward.^{[7][15][3][2]}
4. To make something move or act very quickly; to hasten.^[3][2][8]
5. (chemistry) To cause a solid to separate from a solution, or to separate in this way: Cooling precipitated the salt from the liquid.^{[7][15][3][2]}
6. (meteorology) To cause water vapour to condense and fall as rain or snow, or to fall in this way.^{[7][15][3][2]}
7. To fall headlong; to descend steeply.^[3][2]
8. To become distinct, or to take a material or observable form.^[3]
9. (obsolete, 1622–1758) To move or act with excessive haste.^[2][3]

Adjective

1. Done, or acting, with too much haste and too little thought; rash: a precipitate decision to sell the farm.^{[7][15][3][2]}
2. Moving at great speed; headlong: a precipitate retreat from the valley.^{[7][15][3][2]}
3. Very sudden or abrupt, including, in obstetrics, of very rapid labour.^{[7][15][3][2]}
4. (rare) Very steep; precipitous.^[8][3][2]
5. (obsolete, 1614–1850) Falling or descending steeply.^[2][13]

Noun

1. (chemistry) A solid separated from a solution, whether suspended in it or settled or filtered out.^{[7][15][3][2]}
2. A product or outcome of a process or course of events.^[7][3][2]
3. (chemistry) Any of various mercury compounds formed by precipitation, now only in names such as red precipitate and white precipitate.^[2][8]
4. (meteorology) Moisture condensed from water vapour and falling as rain, dew or the like.^[2][8][5]

Word family

• precipitately
• precipitateness
• precipitative
• precipitator
• coprecipitate
• precipitin

Related words

• precipice
• precipitation
• precipitous
• precipitant
• capital
• head

Usage notes

The American Heritage Dictionary notes that precipitate and precipitately now describe rash, headlong actions, while precipitous means "steep", literally and figuratively.^[7] Precipitous is also often used for "abrupt, hasty", the territory of precipitate.^[7] Many people object, wishing to keep the two apart, but the dictionary calls the extension natural, and 65 percent of its Usage Panel accepted one such sentence in a 2004 survey.^[7] Merriam-Webster distinguishes precipitate, stressing speed and perhaps too little thought, from headlong, a wild rush with no look ahead, impetuous, impulsive force or impatience, and hasty, which may add carelessness or anger.^[3]

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 o p q r s t u v w x y z 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
3. ^ a b c d e f g h i j k l m n o p q r s t u v Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
4. ^ a b Dictionary.com Unabridged (2016), based on the Random House Unabridged Dictionary, New York: Random House
5. ^ a b c d e f g h i j k l m n Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
6. ^ a b c d e f g h i j k l m n Barnhart, Robert K. (1988), The Barnhart Dictionary of Etymology
7. ^ a b c d e f g h i j k l m n o p The American Heritage Dictionary of the English Language (online 2024), 5th ed., Boston: Houghton Mifflin Harcourt
8. ^ a b c d e f Shorter Oxford English Dictionary on Historical Principles (2002), 5th ed., ed. William R. Trumble and Angus Stevenson, Oxford: Oxford University Press
9. ^ Klein, Ernest. A Comprehensive Etymological Dictionary of the English Language. 2 vols. Amsterdam: Elsevier, 1966–1967.
10. ^ Stevenson, Angus, ed. (2010), Oxford Dictionary of English, 3rd ed., Oxford: Oxford University Press
11. ^ Soanes, Catherine; Stevenson, Angus, eds. (2004), Concise Oxford English Dictionary, 11th ed., Oxford: Oxford University Press
12. ^ Mapping Metaphor with the Historical Thesaurus, University of Glasgow, mappingmetaphor.arts.gla.ac.uk
13. ^ a b c Johnson, Samuel (1755), A Dictionary of the English Language, London; 4th ed. 1773; Johnson's Dictionary Online, ed. Beth Rapp Young et al.
14. ^ Cassidy, Frederic G. & Joan Houston Hall (eds.) (1985–2002), Dictionary of American Regional English, vols I–IV, Cambridge, Mass.: Belknap Press of Harvard University Press
15. ^ a b c d e f g h Collins English Dictionary (2023), Glasgow: HarperCollins