- Confidence
- Established
- Formation
- Inherited
- First attested
- before 800
- Inherited from
- Old English fūl
- Ultimate origin
- Proto-Indo-European (*pu-)
Pronunciation
- IPA: /faʊl/, /ˈfaʊ.əl/[1]
Etymology
It is Middle English foul, inherited from Old English fūl (“rotten, unclean, vile, corrupt”),[2][3][4] from Proto-Germanic *fūlaz,[2][3][4] source also of Dutch vuil, German faul (“rotten, lazy”), Old Norse fúll and Gothic 𐍆𐌿𐌻𐍃 (fūls), stinking,[3][2][5] from Proto-Indo-European *pu-, to rot, decay, perhaps from the sound made on smelling something bad;[3] Latin pūs, pus, and putēre, to stink, are cognate.[2][6][4]
Earliest recorded meaning
Grossly offensive to the senses, stinking: before 800.[7][2]
Semantic evolution
The original sense was stinking or disgusting.[6] Old English fūl occasionally meant ugly, as the opposite of fæger, fair;[3] Hoad dates the sense opposite of fair to Middle English.[4] Dirty, soiled, is from about 1000,[7] and of weather from the mid-14th century.[3] Foul play is recorded from the mid-15th century,[3][6] and in sport, irregular or contrary to the rules, from 1797,[3] with players able to complain of a foul from the 1750s.[6] In baseball, out of play, it is by 1860.[3] The verb, Old English fūlian, to rot, meant to make foul or pollute from about 1200,[3] and to become entangled, chiefly nautical, from 1832.[3]
Timeline
- before 800 – stinking.[7]
- c. 1000 – dirty.[7]
- c. 1200 – to pollute (verb).[3]
- mid-14th century – of weather.[3]
- mid-15th century – foul play.[3]
- 1797 – against the rules.[3]
- 1832 – to become entangled.[3]
- 1860 – a foul ball.[3]
Modern meaning
Adjective
- Offensive to the senses; disgusting or stinking.
- Full of dirt or impurities; polluted.
- Morally offensive; wicked.
- Obscene or vulgar: foul language.
- Of weather, unpleasant or stormy.
- Against the rules of a game; unfair.
- Entangled, clogged or obstructed.
Noun
- A breach of the rules of a game.
- An entanglement or collision.
Verb
- To make dirty; to pollute.
- To commit a foul against a player.
- To clog, obstruct or entangle.
Word family
- foully
- foulness
- afoul
- befoul
- biofouling
- filth
- foulbrood
- foulmouthed
Related words
- fair
- putrid
- pus
- defile
References
- ^ Wiktionary, the free dictionary, https://en.wiktionary.org
- ^ a b c d e Barnhart, Robert K. (1988), The Barnhart Dictionary of Etymology
- ^ a b c d e f g h i j k l m n o p q Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
- ^ a b c d Hoad, T. F., ed. (1986), The Concise Oxford Dictionary of English Etymology, Oxford: Clarendon Press
- ^ Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
- ^ a b c d Cresswell, Julia (2021), Oxford Dictionary of Word Origins, 3rd ed., Oxford: Oxford University Press
- ^ a b c d Simpson, J. A.; Weiner, E. S. C., eds. (1989), The Oxford English Dictionary, 2nd ed., Oxford: Clarendon Press
Related etymologies
Cite this entry
“Foul.” Etymologically, 17 Oct. 2026, etymologically.com/en/foul. Accessed 17 Oct. 2026.
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