The compound noun 'wide-body' is a modern, transparent formation from two native English words. 'Wide' originates from the Proto-Germanic wīdaz, conveying the concept of breadth and spaciousness. 'Body' stems from the Old English bodig, which referred to the physical frame or torso. In the mid-20th century, the aviation industry combined these terms to create a highly descriptive, functional name for a new class of jetliners characterized by their broad fuselages, designed to carry significantly more passengers in a twin-aisle configuration. The term's logic is purely literal, directly mapping the physical attribute ('wide') onto the object's core structure ('body'), and has since been extended metaphorically to other vehicles with similar proportions.

Structure: wide (broad) + body (main structure) - wide: From Old English wīd (spacious, extensive). An adjective describing a large extent from side to side. - body: From Old English bodig (trunk, torso, physical structure). A noun referring to the main, central part of something.