system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How do people come up with new words for new inventions, like the word "film" or "movies" or "video" for when they invented video recording?

Like when they created that riding horse video that it is the first video created, using the idea of frames per second and motion image. How do people think: wow let's call this a movie, let's call this a video etc

Or when they invented the train, they just go like "look at this amazing way of transportation, let's call it a train"
gpt
The word movie is a shortened version of what they used to call it: moving picture. The words generally come from descriptions of what the thing is, sometimes from other languages, sometimes not. Train, for example, comes from the Latin traphere which means to pull or draw. Then it got translated to French trahiner which eventually became train.