Words related to ugly
suffix forming adjectives from nouns and meaning "having qualities of, of the form or nature of" (manly, lordly), "appropriate to, fitting, suited to" (bodily, earthly, daily); irregularly descended from Old English -lic, from Proto-Germanic *-liko- (Old Frisian -lik, Dutch -lijk, Old High German -lih, German -lich, Old Norse -ligr), related to *likom- "appearance, form" (Old English lich "corpse, body;" see lich, which is a cognate; see also like (adj.), with which it is identical).
Old English lað "hated; hateful; hostile; repulsive," from Proto-Germanic *laitha- (source also of Old Saxon leth, Old Frisian leed "loathsome," Old Norse leiðr "hateful, hostile, loathed;" Middle Dutch lelijc, Dutch leelijk "ugly;" Old High German leid "sorrowful, hateful, offensive, grievous," German leid "hateful, painful"), from PIE root *leit- (1) "to detest."
And niðful neddre, loð an liðer, sal gliden on hise brest neðer [Middle English Genesis and Exodus, c. 1250]
Weakened meaning "averse, disinclined" is attested from late 14c. "Rare in 17th and 18th cents.; revived in the 19th c. as a literary word" [OED]. Loath to depart, a line from some long-forgotten song, is recorded since 1580s as a generic term expressive of any tune played at farewells, the sailing of a ship, etc. French laid, Italian laido "ugly" are from the same Germanic source. The sense "ugly" persisted in English into 15c. in the marriage service, where a man took his wife for fayrer, for layther. Related: Loathness.
"city ruffian, one of a gang who assaulted people and property in mid-19th century American cities," 1856, originally in Baltimore, from plug (n.), the American English slang name for the tall, silk stovepipe hats then popular among young men, + ugly. Sometimes as the name of a specific gang, but often generic.