'robustly-grown' originates from the Latin word 'robustus,' meaning 'strong' or 'hardy,' combined with the English word 'grown,' derived from the Old English 'grōwan,' meaning 'to grow.'

'robustus' transformed into the Middle English word 'robuste,' and eventually became the modern English word 'robust.' 'Grōwan' evolved into 'grown' in modern English.

Initially, 'robust' meant 'strong' or 'hardy,' and 'grown' meant 'to grow.' Together, they describe something that has been grown in a strong and healthy manner.