mitigate

Etymology

It is inherited from Middle English mitigaten,^[2][3][4] borrowed from Latin mītigō (“to soften, soothe, make mild”), taken from its past participle mītigātus.^[5][6][7][8] The Latin verb is formed from mītis (“mild, gentle, soft”) and the root of agō (“to drive, do, make”);^[6][2][7][9] the OED explains the second part as a verbal suffix also found in pūrgō.^[5] Barnhart assumes a lost adjective *mitigus (“making mild”), and notes that some Middle English uses may be a back-formation from the earlier noun mitigation.^[7] The Latin adjective is cognate with Old Irish méth (“fat, rich”) and Welsh mwydyn (“soft part”);^[5] Etymonline, after de Vaan, adds Lithuanian mielas (“nice, dear”) and a reconstructed Proto-Indo-European *mehiti- (“soft”).^[6] Related forms in the Romance languages are mitiger, mitigare and mitigar.^[5]

Earliest recorded meaning

To relieve an illness, a pain or suffering: before 1425, in a translation of Guy de Chauliac's Grande Chirurgie.^[5][7] The noun mitigation is older, recorded before 1376 in Piers Plowman.^[7]

Semantic evolution

From the relief of pain the verb spread in the 16th century to moderating behaviour and feelings (about 1500), to appeasing a person's anger (before 1513), and to making laws less strict (1532) and punishments less severe (before 1533).^[5] From 1651 it was used of making an offence seem less grave, the sense behind mitigating circumstances;^[5] Weekley compares the German phrase mildernde Umstände.^[10] An adjective mitigate, mitigated, was used from the 15th century to 1592.^[5] Johnson (1755) gives "to soften; to make less rigorous" and "to alleviate; to assuage".^[11] In 20th-century civil law a person who suffers a wrong has a duty to mitigate the loss (1912).^[5]

Timeline

• before 1376 – the noun mytygacioun, in Piers Plowman.^[7]
• before 1425 – to relieve pain or illness.^[5][7]
• c. 1500 – to moderate one's behaviour or feelings.^[5]
• 1532 – to make a law or policy less strict.^[5]
• before 1533 – to reduce a punishment.^[5]
• 1651 – to make an offence seem less serious.^[5]
• 1912 – in civil law, to reduce a loss or damage.^[5]

Meanings

Verb

1. To make something less severe, painful, harsh or serious: New dams helped mitigate the flooding.^[9][12][5]
2. To make an offence seem less grave; to extenuate it, as in mitigating circumstances.^[5][13]
3. (law) To reduce the loss or damage one suffers from a wrong.^[5][13]
4. To become less severe.^[9]

Word family

• mitigable
• mitigation
• mitigator
• mitigative
• mitigatory
• mitigatedly

Related words

• militate
• agent
• act

Usage notes

Mitigate is sometimes used by mistake for militate, to have weight for or against something: "his record militates (not mitigates) against promotion".^[9][13] Grammarphobia explains that mitigate against makes no sense, since to mitigate is to make milder.^[14]

References

1. ^ Wiktionary, the free dictionary, https://en.wiktionary.org
2. ^ a b The American Heritage Dictionary of the English Language (online 2024), 5th ed., Boston: Houghton Mifflin Harcourt
3. ^ Klein, Ernest. A Comprehensive Etymological Dictionary of the English Language. 2 vols. Amsterdam: Elsevier, 1966–1967.
4. ^ 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 o p q r Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
6. ^ a b c Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
7. ^ a b c d e f g Barnhart, Robert K. (1988), The Barnhart Dictionary of Etymology
8. ^ Hoad, T. F., ed. (1986), The Concise Oxford Dictionary of English Etymology, Oxford: Clarendon Press
9. ^ a b c d Collins English Dictionary (2023), Glasgow: HarperCollins
10. ^ Weekley, Ernest (1921), An Etymological Dictionary of Modern English, London: John Murray
11. ^ Johnson, Samuel (1755), A Dictionary of the English Language, London; 4th ed. 1773; Johnson's Dictionary Online, ed. Beth Rapp Young et al.
12. ^ Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
13. ^ a b c Garner, Bryan A., ed. (2004), Black's Law Dictionary, 8th ed., St. Paul, Minn.: Thomson West
14. ^ O'Conner, Patricia T.; Kellerman, Stewart, The Grammarphobia Blog, grammarphobia.com, p. "Is it “militate” or “mitigate”?", 28 November 2006