Definition of the word train at

The phrase "train at" is a combination of two words - "train" and "at". The word "train" originally comes from the Old French word "trainier", which means to press, harden or draw out. However, in the context of transportation, the term "train" replaced the earlier term "carriage" in the mid-19th century to describe a series of connected railway cars that are pulled by an locomotive. The word "at" is a preposition that generally indicates a location, but in this case, it's being used in a different way. In this phrase, "at" is a preposition that connects the location where someone or something is exercising or preparing (usually a gym or sports venue) with the action being taken, which is to train or learn a specific skill. Thus, when we say "train at XYZ Gym", we're conveying the idea that we're going to a specific location to train or exercise, implying that XYZ Gym provides the necessary equipment, trainers, and facilities for that particular form of training or exercise. In summary, the phrase "train at" is a combination of two existing words that help convey the meaning of exercising or learning a specific skill in a given location.