The word "seen" is the past participle of the verb "see." It refers to the act of perceiving something with the eyes or to have observed or witnessed something at some point in the past. It implies having visual contact with things, people, or events.
The word "seen" comes from the Old English word "seon," which means "to see or perceive." It is rooted in the Proto-Germanic word "*sehwan," which also means "to see." The past participle form "seen" has its origins in the Old English past participle "gesen."