Etymology
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trivial (adj.)
"ordinary" (1580s); "insignificant, trifling" (1590s), from Latin trivialis "common, commonplace, vulgar," literally "of or belonging to the crossroads," from trivium "place where three roads meet," in transferred use, "an open place, a public place," from tri- "three" (see three) + via "road" (see via). The sense connection is "public," hence "common, commonplace."

The earliest use of the word in English was early 15c., a separate borrowing in the academic sense "of the trivium" (the first three liberal arts -- grammar, rhetoric, and logic); from Medieval Latin use of trivialis in the sense "of the first three liberal arts," from trivium, neuter of the Latin adjective trivius "of three roads, of the crossroads." Related: Trivially. For sense evolution to "pertaining to useless information," see trivia.
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trivialize (v.)
1836, from trivial + -ize. Related: Trivialized; trivializing.
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triviality (n.)

1590s, "quality of being trivial," from French trivialite or else from trivial + -ity. Meaning "a trivial thing or affair" is from 1610s. Related: Trivialities.

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trivia (n.)

"trivialities, bits of information of little consequence," by 1932, from the title of a popular book by U.S.-born British aphorist Logan Pearsall Smith (1865-1946) first published in 1902 but popularized in 1918 (with "More Trivia" following in 1921 and a collected edition including both in 1933), containing short essays often tied to observation of small things and commonplace moments. Trivia is Latin, plural of trivium "place where three roads meet;" in transferred use, "an open place, a public place." The adjectival form of this, trivialis, meant "public," hence "common, commonplace" (see trivial).

The Romans also had trivius dea, the "goddess of three ways," another name for Hecate, perhaps originally in her triple aspect (Selene/Diana/Proserpine), but also as the especial divinity of crossroads (Virgil has "Nocturnisque hecate triviis ululata per urbes"). John Gay took this arbitrarily as the name of a goddess of streets and roads for his mock Georgic "Trivia: Or, the Art of Walking the Streets of London" (1716); Smith writes in his autobiography that he got the title from Gay.

I KNOW too much; I have stuffed too many of the facts of History and Science into my intellectuals. My eyes have grown dim over books; believing in geological periods, cave dwellers, Chinese Dynasties, and the fixed stars has prematurely aged me. ["Trivia," 1918 edition]

Then noted c. 1965 as an informal fad game among college students wherein one asked questions about useless bits of information from popular culture ("What was Donald Duck's address?") and others vied to answer first.

Nobody really wins in this game which concentrates on sports, comics and television. Everyone knows that Amos's wife on the "Amos 'n' Andy Show" is Ruby, but who knows that she is from Marietta, Georgia? Trivia players do. They also know the fourth man in the infield of Tinker-to-Evers-to-Chance, the Canadian who shot down Baron Von Richtofen, and can name ten Hardy Boy books. [Princeton Alumni Weekly, Nov. 9, 1965]

The board game Trivial Pursuit was released 1982 and was a craze in U.S. for several years thereafter.

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prittle-prattle (n.)

"trivial, idle, or worthless talk," 1550s, a varied reduplication of prattle. Also from 1550s as a verb.

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devastating (adj.)

1630s, "laying waste, ravaging," present-participle adjective from devastate. Trivial or hyperbolic use is by 1889.

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penny-ante (adj.)
"cheap, trivial," 1935; extended from use in reference to poker played for insignificant stakes (1855), from penny + ante.
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chit-chat (n.)

also chitchat, "familiar or trivial talk, gossip," 1710, diminishing reduplicated form of chat. The verb is attested from 1821. Related: Chit-chatting.

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poppycock (n.)

"trivial talk, nonsense," 1865, American English, probably from Dutch dialect pappekak, from Middle Dutch pappe "soft food" (see pap) + kak "dung," from Latin cacare "to excrete" (from PIE root *kakka- "to defecate").

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minutia (n.)

"a small particular or detail, a trivial fact," 1751, usually in plural minutiae, from Latin minutia "smallness" (plural minutiae, in Late Latin "trifles"), from minutus "small" (from PIE root *mei- (2) "small").

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