IPA: /ˈsprɪŋɪŋ/
KK: /sprɪŋɪŋ/
A point where an arch starts to rise from its base or support.
The architect carefully designed the springing of the arch to ensure stability.
Springing → It is formed from "spring" (from Old English *springan*, meaning to leap or jump) and "-ing" (a suffix used to indicate the action or process of). The word "springing" refers to the action of leaping or jumping.
Think of the Old English word for leaping or jumping — that's what springing means, the action of leaping.