'amaranthoid' originates from the Greek word 'amarantos,' meaning 'unfading,' combined with the suffix '-oid,' meaning 'resembling or like.'

'amarantos' transformed into the English word 'amaranth,' and eventually became the modern English word 'amaranthoid' through the addition of the suffix '-oid.'

Initially, it meant 'unfading or eternal,' but over time it evolved into its current meaning of 'resembling the amaranth plant.'