Several meanings, one set of feet
In modern English, trip is the ordinary word for a journey with a purpose and usually a return: a business outing, a day away, a round voyage. The same short form also means to stumble, to catch someone else's foot, to set off a switch, and, since the mid-twentieth century, to pass through a hallucinogenic episode. Those uses look scattered until you notice that almost all of them began as talk about the feet.
The origin of the word trip is a late-medieval verb for light, nimble movement. It did not enter English as a travel term. It entered as a way to name skipping, dancing, and stepping quickly.
Borrowed through French
English took the verb in the later fourteenth century. Middle English wrote it as trippen, with the sense of treading lightly, skipping, or dancing. The earliest dated evidence usually cited is from about 1380, in the romance Sir Ferumbras. Broader chronologies place first use in the same century, sometimes as a range from 1350 to 1400.
The immediate source is Old French. Twelfth-century forms include triper, tripper, and treper, already meaning to jump about, dance around, or strike with the feet. Anglo-French used treper and triper as well. Historical dictionaries treat English trip as a borrowing from French, and they add that the French verb itself came from a Germanic source.
A minority path remains on the table. Some accounts allow that Middle English trippen might have come straight from Middle Dutch trippen, which meant to skip, hop, stamp, or trample. Others treat the Old French verb as a loan from Middle Dutch. The disagreement is about the last hop into English, not about the family. French, Dutch, and English all sit on the same North Sea cluster of step-words.
The noun was not a second loan. It was formed inside English by conversion from the verb and is dated from the early fifteenth century.
A Germanic step-family
The French verb was not Latin in origin. Middle Dutch trippen covered both skipping and trampling. Modern Dutch keeps trippelen for a toddling or pattering gait and trappen for stamping. German has trippeln, a scurrying little step. West Frisian has tripje. Danish trippe and Swedish trippa still describe mincing or tripping steps. Old English already had a related native verb, treppan, to tread or trample, so English was meeting a cousin, not an alien root.
That group belongs with other Germanic words for a stair, a step, or a tread. It is kin to English trap and tramp, and more loosely to tread. A reconstructed Indo-European base for running, walking, and stepping has been proposed behind this family, with an extended form tied to the trap set. That reconstruction is a scholarly sketch of the deeper group, not a documented English ancestor of trip itself. In English the morphology is simple: a short verb with no living prefix or suffix, later reused as a noun of the same shape.
From dance to stumble
The oldest English sense is graceful, not clumsy. Elizabethan playwrights used trip for nimble dancing. The dance sense survives in the set phrase trip the light fantastic, which grew out of a passage in Milton and, by the mid-nineteenth century, could mean simply to go dancing.
The awkward sense arrived later. By the mid-fifteenth century, speakers used trip intransitively for losing one's balance and transitively for knocking someone else's foot so that they fell. Wrestling kept that meaning as a named move. How a word for dancing became a word for falling is not settled. Reference works note that the path from a light tread to a clumsy stumble is unclear. A light step and a false step share the same body part; the records do not prove a single neat metaphor.
Once the stumble existed, figurative uses followed. Around 1500, to trip could mean to err or go wrong. By the 1550s, to trip someone up meant to catch them in a fault. Those senses are still ordinary: a witness tripped in cross-examination, a speaker who trips over a word.
The journey problem
The noun meaning a short journey or voyage is recorded from the mid-fifteenth century. The link to the earlier foot-senses is uncertain. One older sketch treated the travel sense as a later nautical use; current references put it in the fifteenth century and still refuse to draw a straight line from skip to voyage. The idea that a stretch of light stepping became a stretch of travel is attractive, but it remains a guess.
From the journey sense came the twentieth-century slang for a psychedelic episode. The noun is attested from 1959; the matching verb, to trip on a drug, from 1966. Some popular histories credit United States Army researchers of the 1950s, who were experimenting with LSD, with coining that use. Whatever the first speaker, historical dictionaries treat it as an extension of the journey, not as a clipping of a chemical name such as tryptamine.
Later slang widened the same metaphor. An ego trip or a guilt trip is not travel and not a drug; it is an absorbing spell of attitude, built on the journey sense rather than the stumble.
Machines, and a flock beside them
Technical English reused the same short verb for a sudden release. Trip-wire is recorded from 1868. To trip a catch or lever appears at the end of the nineteenth century, including a camera context from 1897. Electricians still speak of a trip that cuts a circuit. Nautical English added specialized senses: raising an anchor from the bottom, tipping a yard for lowering. Those are later applications of a catch-and-release, not new loans.
A homonym sits beside all this: trip as a collective for goats, sheep, or other animals. That use is recorded from the late thirteenth or early fourteenth century. Some dictionaries treat it as a special application of the same word, a group moving together. Others derive Middle English tryppe from Old French trippe and leave open a link to troop. The flock sense is old, but it is not the source of the journey.
What the dating still shows
If you want one firm takeaway, take the date of the verb. About 1380, English already had trippen as a light motion of the feet, borrowed from French that had itself borrowed from Germanic. The travel sense, the stumble, the mechanical switch, and the acid episode are later English developments of that same short form. Dutch trippelen and German trippeln still point back to the skip that came first.