Words related to jar

jargon (n.)
mid-14c., "unintelligible talk, gibberish; chattering, jabbering," from Old French jargon "a chattering" (of birds), also "language, speech," especially "idle talk; thieves' Latin" (12c.). Ultimately of echoic origin (compare Latin garrire "to chatter").

From 1640s as "mixed speech, pigin;" 1650s as "phraseology peculiar to a sect or profession," hence "mode of speech full of unfamiliar terms." Middle English also had it as a verb, jargounen "to chatter" (late 14c.), from French.
jay (n.)

the common European jay (Garrulus glandarinus), early 14c. (late 12c. as a surname), from Old North French gai, Old French jai "magpie, jay" (12c., Modern French geai), from Late Latin gaius "a jay," probably echoic of the bird's harsh warning cry and supposedly influenced by Latin Gaius, a common Roman proper name.

For other bird names from proper names, compare martin and parrot. Applied to the North American blue jay (Cyanocitta cristata) from 1709; it is unrelated but has similar vivid markings, is noisy and restless, and also has a harsh call. Applied to humans in sense of "impertinent chatterer, loud, flashy dresser" from 1520s. Jolly as a jay was a Middle English expression for "very happy, joyful."

garrulous (adj.)
1610s, from Latin garrulus "talkative, chattering," from garrire "to chatter," from PIE root *gar- "to call, cry," of imitative origin (compare Greek gerys "voice, sound," Ossetic zar "song," Welsh garm, Old Irish gairm "noise, cry"). Related: Garrulously; garrulousness.
jarring (adj.)
"having a sharp, unpleasant effect," 1550s, present-participle adjective from jar (v.). Related: Jarringly.
bell-jar (n.)
1830, so called for its shape, from bell (n.) + jar (n.). Earlier was bell-glass (1680s).
jarhead (n.)
also jar-head, "U.S. Marine," by 1985 (but in a biographical book with a World War II setting), from jar + head (n.). Also used as a general term of insult (by 1979) and by 1922 as a Georgia dialectal word for "mule."
nightjar (n.)

short-billed nocturnal bird, goatsucker, 1620s, from night + jar (v.). So called for the "jarring" sounds made by the male when the female is brooding, which have been described as a "churring trill that seems to change direction as it rises and falls." An Old English word for it was nihthræfn "night raven."