'triumvir' originates from Latin, specifically the word 'triumviri,' where 'tri-' meant 'three' and 'vir' meant 'man.'

'triumviri' transformed into the English word 'triumvir,' and eventually became the modern English word 'triumvirs' as its plural form.

Initially, it meant 'one of three men in power,' and this meaning has largely remained the same in modern usage.