'The Rapture' is a biblical term: Scripture itself uses the word 'rapture' for believers being caught up to meet Jesus.

1 Thessalonians 4:17 is real, and it does describe believers being "caught up" together with the Lord in the clouds. The Greek verb there is harpazo (ἁρπάζω), "to snatch" or "seize." When Jerome translated the New Testament into Latin for the Vulgate around 400 AD, he rendered that verb as rapiemur, from the Latin rapio, "to seize" or "carry off," the same root behind English words like "rapacious" and "rapture." English Bible translations, though, render the Greek directly as "caught up," not "raptured." So "rapture" isn't a translation choice at all. It's a theological label that entered English through a Latin gloss on the passage, not through any English Bible text. Harpazo itself is ordinary New Testament vocabulary: it is the verb for Philip being carried off by the Spirit at Acts 8:39, and Paul uses it of being caught up into the third heaven at 2 Corinthians 12:2.

The label is old and traceable; the specific doctrine now attached to it (a "Rapture" as a distinct, pre-tribulation removal of the church from earth ahead of a period of end-times judgment, followed later by Christ's visible return) is much younger than the word. That systematized version traces to John Nelson Darby (1800-1882), the Anglo-Irish founder of the Plymouth Brethren, who wrote in 1850 that he'd arrived at the framework around 1830. It reached a mass American audience through the Scofield Reference Bible, published in 1909, which built Darby's dispensational timeline directly into its widely-read study notes.

None of this means 1 Thessalonians 4:17 describes nothing, or that pretribulationism was invented out of thin air. It's a real reading of real texts, held by serious people, and disagreeing about timing doesn't make it dishonest. What's fair to say plainly: the word "rapture" is a sixteen-hundred-year-old Latin label attached to a Greek verb, and the fully worked-out doctrine of a separate, pre-tribulation "Rapture event" is a nineteenth-century systemization, not a term the apostles used, and not a timeline the earliest church held. The event language is biblical. The word is Latin. The specific timing scheme is about two hundred years old.