Definition
adjCovered with, or containing unclean matter; dirty.
adjObscene, vulgar or abusive.
Sentence Examples
No love is foul nor prison fair.
You have foul breath.
It's foul of you to have concealed it.
Word Origin & History
Inherited from Middle English ffoul, foul, foull, fowel, fowle, fuyle, voul, vul, from Old English fūl (“foul, dirty, unclean, impure, vile, corrupt, rotten, stinking, guilty”), from Proto-West Germanic *fūl, from Proto-Germanic *fūlaz (“foul, rotten”), from Proto-Indo-European *puH- (“foul, rotten”).
Cognates
Cognate with Central Franconian fuul (“putrid, rotten; lazy, workshy”), Cimbrian baul, vaul (“putrid, rotten”), Dutch vuil (“dirty, foul; lewd, obscene; dishonorable; illegal”), German faul (“foul, putrid, rotten; lazy”), Yiddish פֿױל (foyl, “putrid; lazy”), Danish ful (“nasty, ugly”), Icelandic fúll (“foul, rotten, sullen”), Norwegian Bokmål and Norwegian Nynorsk ful (“clever, sly”), and Swedish ful (“ugly; bad, dirty”), Gothic 𐍆𐌿𐌻𐍃 (fuls, “fetid, foul, putrid”), and through Indo-European, with Latin puter (“decaying, rotten; friable, crumbling”), Greek πύο (pýo), πύον (pýon, “pus”), Albanian fëlliq (“to make dirty, sully”), Latvian pūt (“to rot”), Lithuanian pūti (“to rot”), Armenian փուտ (pʻut, “rottenness”), Persian پوده (pude, “rubbed, worn; foul, rotten; empty, hollow”), Sanskrit पूयति (pūyati, “to become foul; to stink”). More at putrid.
Ancient Greek φαῦλος (phaûlos, “bad”) is a false cognate inasmuch as it is not from the same etymon, instead being cognate to few.
Literary Quotations & Historical Citations
"It was, however, most interesting work, and the moulders themselves were a decent crowd, never tired of making jokes about themselves such as the hoary one that moulders did not live long, which however ran counter to the other one that no germs could live in a foundry—the atmosphere was too foul."
— 1944 November and December, A Former Pupil, “Some Memories of Crewe Works—II”, in Railway Magazine, page 342:
"Since the mid-1980s, when Indonesia first began to clear its bountiful forests on an industrial scale in favour of lucrative palm-oil plantations, “haze” has become an almost annual occurrence in South-East Asia. The cheapest way to clear logged woodland is to burn it, producing an acrid cloud of foul white smoke that, carried by the wind, can cover hundreds, or even thousands, of square miles."
— 2013 June 29, “Unspontaneous combustion”, in The Economist, volume 407, number 8842, page 29:
"[…]Hast thou forgot / The foul witch Sycorax, who with age and envy / Was grown into a hoop? Hast thou forgot her?"
— 1610–1611 (date written), William Shakespeare, “The Tempest”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, →OCLC, [Act II, scene ii]:
"Who first seduced them to that foul revolt?"
— 1667, John Milton, “Book I”, in Paradise Lost. […], London: […] [Samuel Simmons], and are to be sold by Peter Parker […]; [a]nd by Robert Boulter […]; [a]nd Matthias Walker, […], →OCLC; republished as Paradise Lost in Ten Books: […], London: Basil Montagu Pickering […], 1873, →OCLC:
"Cultural norms and social rules regulate whether someone can be among others or will be isolated, whether the sick will be considered foul or acceptable, and whether they are to be pitied or censured."
— 1982 March 18, Eric J. Cassel[l], “The Nature of Suffering and the Goals of Medicine”, in The New England Journal of Medicine, volume 306, number 11, →DOI, page 642: