'carefully-designed' originates from the combination of 'carefully' and 'designed', where 'carefully' is derived from 'care' meaning 'attention' and 'designed' from 'design' meaning 'to plan'.

'carefully' evolved from the Old English word 'caru' meaning 'sorrow, anxiety' and 'designed' from the Latin 'designare' meaning 'to mark out'.

Initially, 'carefully' meant 'with sorrow or anxiety', but over time it evolved to mean 'with attention or caution'. 'Designed' has largely retained its meaning of 'planned or created'.