'serenely-organized' originates from the combination of 'serene' and 'organized', where 'serene' comes from Latin 'serenus' meaning 'clear, calm' and 'organized' from Greek 'organon' meaning 'tool, instrument'.

'serene' changed from the Latin word 'serenus' and 'organized' from the Greek word 'organon', eventually forming the modern English compound adjective 'serenely-organized'.

Initially, 'serene' meant 'clear, calm' and 'organized' meant 'arranged systematically', but over time, the compound adjective 'serenely-organized' evolved to mean 'calmly and efficiently arranged'.