the.com/hub

The point everything connects to, and therefore the point everything can fail from.

means The central part of something that other parts attach to or branch out from — a wheel's core, an airport's main hub, or wherever activity concentrates.

from The word's root sense is the solid center of a wheel that the spokes radiate from — attested in English since the 1600s, though its deeper origin is murky; some trace it to 'hob,' an old word for a rounded lump or the raised back ledge of a fireplace. The leap from wheel-center to 'center of activity' (a transport hub, a hub of industry) came naturally once people needed a word for the thing everything else connects to.

origin
from wheel hub, the center every spoke depends on
airline logic
hub-and-spoke saves routes, costs you layovers
network theory
remove one hub, half the internet notices
irony
the most connected point is the easiest single failure
the.com · every word