inadvertent

Etymology

The OED takes it as formed from English in- + advertent,^[2] and the Shorter Oxford and the Oxford Dictionary of English from the same prefix and Latin advertent-, the present participle stem of advertō (“to turn the mind to”).^[3][4] Etymonline, Barnhart, Klein and Merriam-Webster Unabridged call it a back-formation from inadvertence or inadvertency,^[5][6][7][8] with the suffix -ent.^[7][6] That noun is recorded from the mid-15th century,^[5][6] from Old French inadvertance, from Scholastic Latin inadvertentia,^[5][2] and the Latin verb is formed from ad- (“toward”) and vertō (“to turn”), so the word is related to advert and advertise.^[5][9]

Earliest recorded meaning

Of a person, not properly attentive or observant; heedless: 1653, in Henry More's Antidote against Atheisme.^[2][5][6]

Semantic evolution

At first the word described people and their dispositions;^[2][5] Johnson (1755) still defined it as "negligent; careless".^[10] From 1724, in Swift, it was used of actions done without attention, and hence unintentional,^[2][5] which is now its main sense.^[8][11] The adverb inadvertently is recorded from 1678 and followed the same path from "carelessly" to "unintentionally".^[2][5] In later use the positive advertent took the opposite meaning, "intentional", after it.^[2]

Timeline

• 1653 – of persons, inattentive, heedless.^[2][8]
• 1724 – of actions, unintentional.^[2][5]

Meanings

Adjective

1. Not intended or planned; accidental: an inadvertent slip of the tongue.^[8][11][2]
2. Not paying proper attention; careless or heedless.^[11][2][10]

Word family

• inadvertently

Related words

• advert
• advertent
• inadvertence
• advertise
• averse

References

1. ^ a b Wiktionary, the free dictionary, https://en.wiktionary.org
2. ^ a b c d e f g h i j k Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
3. ^ Shorter Oxford English Dictionary on Historical Principles (2002), 5th ed., ed. William R. Trumble and Angus Stevenson, Oxford: Oxford University Press
4. ^ Stevenson, Angus, ed. (2010), Oxford Dictionary of English, 3rd ed., Oxford: Oxford University Press
5. ^ a b c d e f g h i Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
6. ^ a b c d Barnhart, Robert K. (1988), The Barnhart Dictionary of Etymology
7. ^ a b Klein, Ernest. A Comprehensive Etymological Dictionary of the English Language. 2 vols. Amsterdam: Elsevier, 1966–1967.
8. ^ a b c d Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
9. ^ Weekley, Ernest (1921), An Etymological Dictionary of Modern English, London: John Murray
10. ^ 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.
11. ^ a b c Collins English Dictionary (2023), Glasgow: HarperCollins