'robustly-developed' originates from the Latin word 'robustus,' meaning 'strong' or 'hardy,' combined with the English word 'developed,' which comes from the Old French 'desveloper,' meaning 'to unwrap or unfold.'

'robustus' transformed into the English word 'robust,' and 'desveloper' evolved into 'developed,' eventually forming the modern English term 'robustly-developed.'

Initially, 'robust' meant 'strong or hardy,' and 'developed' meant 'unwrapped or unfolded.' Over time, 'robustly-developed' evolved to mean 'strongly or thoroughly developed.'