ハブ

Etymology 1
Borrowed from.

Noun

 * 1)  hub, a computer networking device
 * 2) a center or core
 * 3) central part of a wheel

Etymology 2
Borrowed from, where this kind of snake is native. Appears to be cognate with 🇨🇬, and related to verb.

First cited in Japanese to a text from 1795.

Noun

 * 1)  Trimeresurus flavoviridis (now ), a species of venomous pit viper native to Okinawa

Etymology 3
Shortening of noun form, in turn from verb.

Noun

 * 1)  someone who is left out of a group

Usage notes
May be used in a verb construction as. Alternatively, the derived verb may be used instead.