'ganglionic' originates from Greek, specifically the word 'ganglion,' where 'ganglion' meant 'a knot or swelling.'

'ganglion' transformed from the Greek word 'ganglion' and eventually became the modern English word 'ganglion' through Latin.

Initially, it meant 'a knot or swelling,' but over time it evolved into its current meaning of 'a mass of nerve cells.'