Vergency

Part of speech: noun

Definitions

1. The characteristic of forces that leads them to come together at a single point or area exemplifies convergence in motion and action
2. Referring to the inclination of objects or actions to unite or focus toward a defined center enables a notion of directed movement
3. The quality of moving or directing toward a shared focal spot or center

Etymology: "Vergency" is a plain English formation: the noun "verge" (in the sense of a line or tendency that moves toward something) combined with the suffix "-ency," which turns the stem into a noun of quality or state. The result names the property of things, such as lines of force or light rays, that tend to meet at one point. The word's real ancestry runs through science rather than everyday speech. The Latin root "vergere," meaning to incline or bend toward, is the source of "verge" and of "vergent," and scholars writing in New Latin formed "vergentia" in the 16th century. French then adopted "vergence" in the 18th century, and English took it up as "vergence" in the 20th century, while "vergency" developed as a further English variant built on the same pattern.