full-body

The compound adjective "full-body" is a modern English formation, combining two native Germanic roots. "Full" derives from Proto-Germanic fullaz, tracing back to the Proto-Indo-European pelh₁- ("to fill"), which conveys a sense of completeness. "Body" originates from Old English bodig, whose earlier etymology is uncertain but may relate to concepts of a container or trunk. The logic of the compound is transparently literal: "full" intensifies "body" to specify that something encompasses or applies to the complete physical structure, not just a part. This straightforward compounding reflects a common pattern in English for creating precise descriptive terms, especially in contexts like fitness, medical scans, or immersive experiences.

Structure: full (complete) + body (physical form) - full: From Old English full, meaning "entire, complete." It functions as an intensifier or descriptor of completeness. - body: From Old English bodig, meaning "trunk, torso, physical structure of a human or animal." It functions as the core noun denoting the physical entity.