the.com/swiftness

Speed with intention — not frantic, just unwilling to waste anyone's time.

means The quality of moving or acting quickly.

from Rooted in Old English 'swift,' related to the verb 'to sweep' — both trace back to a Germanic root carrying the sense of moving in a quick, sweeping motion. The '-ness' simply tacks on to turn the quality into a noun — a very old, very plain English way of naming an abstract trait.

origin
from old english swift, meaning quick to move
vs speed
speed is physics, swiftness has grace attached
bird link
swifts barely land, spending months airborne
perception
feels effortless, usually isn't
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