About
The character "铰", with its traditional form "鉸", structurally combines the metal radical 金 (simplified as 钅) with the component 交, which phonetically and semantically suggests intersection. Etymologically, it originally denoted scissors or shears, a metal tool with crossing blades used for cutting, and by extension referred to the action of cutting with such implements. Over time, its meaning expanded to include mechanical hinges or pivots, where two metal parts intersect and rotate, reflecting the conceptual link to crossing inherent in its composition. This shift from a specific cutting tool to a term for joint mechanisms illustrates an adaptation in usage while maintaining the association with metal and intersection.