Everyone agrees that trivial contains three roads. They disagree about which road it took to reach English.

Latin trivium meant a place where three roads meet, from tri-, "three," and via, "road." By extension it meant an open, public place. Its adjective, trivialis, meant "common, commonplace, vulgar." In classical Latin, then, trivial things were the kind you heard on any street corner.

Medieval schools gave trivium a second life. It became the name for the first three liberal arts: grammar, rhetoric and logic. The harder four, arithmetic, geometry, astronomy and music, made up the quadrivium.

English met the school sense first. Etymonline records trivialle in the 15th century, meaning belonging to the trivium. The everyday senses followed much later: "ordinary, such as may be found anywhere" in the 1580s, and "insignificant, trifling" in the 1590s. World Wide Words credits Shakespeare's Henry VI, Part 2 with the first modern use. Merriam-Webster cites "Make trivial price of serious things we have" from All's Well That Ends Well (1603).

So how did "belonging to the basic syllabus" or "found at the crossroads" become "unimportant"? Etymonline and Merriam-Webster tie the commonplace sense to the crossroads, where ordinary people and ordinary things pass. Merriam-Webster calls that explanation "accepted" and treats the curriculum link as another theory.

World Wide Words takes the other side. It says the popular three-roads story has been embellished and the real history is more complicated. In its account, the trivium subjects were seen as easier and more everyday than the quadrivium, so their adjective came to mean "of lesser status." Classical trivialis probably influenced that shift but was not its foundation. Wordorigins.org likewise derives the English words from the medieval curriculum.

The honest verdict is that both Latin senses were available to Renaissance writers, and the evidence does not settle which one did the work. What is certain is the order in English: the schoolroom sense came first.

The noun trivia, the Latin plural of trivium, took its "trifling facts" sense in the 20th century. It comes from Trivia, a 1902 essay collection by Logan Pearsall Smith, and Etymonline records the sense by 1932.