The spelling of sully has shifted several times since it was sylian in Old English, but its meaning has remained essentially the same: "to soil." In case you are wondering whether sullen (meaning "gloomy or morose") is a relative, the answer is "no." Sullen comes from Latin solus, meaning "alone."
Verb
people that sully our state parks with their trash
a once-gleaming marble interior sullied by decades of exposure to cigarette smoke
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Verb
In its first go-round, Beef was ripe with curiosity about first-gen immigrant families and how the fear of leaving home stagnates and sullies us.—Roxana Hadadi, Vulture, 16 Apr. 2026 And could a second season, sans the extraordinary talents of Steven Yeun and Ali Wong, deliver a story and themes in keeping with that brand, without sullying what was so deviously tricky about the original series and its tone?—Daniel Fienberg, HollywoodReporter, 16 Apr. 2026 Crowds were relatively small last month, especially compared to March weekends in the years after the COVID pandemic, when thousands of young people packed Ocean Drive and the party was sullied by shootings, stampedes and curfews.—Aaron Leibowitz, Miami Herald, 6 Apr. 2026 But a battlefield promotion to Ayatollah was arranged, blending faith with politics in an exercise that critics said sullied both even before Khamenei reinforced his position by earthly means, elevating the IRGC.—Karl Vick, Time, 28 Feb. 2026 See All Example Sentences for sully
Word History
Etymology
Verb
Middle English *sullien, probably alteration (influenced by Anglo-French suillier, soiller to soil) of sulen to soil, from Old English sylian