'trigon' originates from Greek, specifically the word 'trigonon,' where 'tri-' meant 'three' and 'gonia' meant 'angle.'

'trigonon' changed from the Greek word 'trigonon' and eventually became the modern English word 'trigon.'

Initially, it meant 'three angles,' but over time it evolved into its current meaning of 'triangle' or 'astrological group of three signs.'