hub
UK[hʌb]US[hʌb]
n
The central and most important part of an area, system, or activity.
n
The central part of a wheel, into which the axle fits.
Etymology
The word 'hub' emerged in English in the early 16th century, originally referring to the solid center of a wheel. Its precise origin is obscure, but it is considered a word of low Germanic origin, possibly related to the obsolete word 'hob' meaning a nave of a wheel or a hub. The core concept of a central, pivotal point is inherent from its earliest use. This literal meaning of a wheel's center was naturally extended metaphorically in the 19th century to describe the focal point of any activity, network, or system, such as a transport hub or a commercial hub, solidifying its modern abstract sense.
Analysis
The word 'hub' is a simplex word of uncertain origin, likely from a Germanic source. It functions as a single, unanalyzable morpheme in modern English.
Examples
The city's airport is a major international travel hub.
The hub of the bicycle wheel was damaged in the accident.
The new innovation district aims to become a hub for tech startups.