'carefully-confirmed' originates from the combination of 'carefully' and 'confirmed'. 'Carefully' comes from 'care', which originates from Old English 'caru', meaning 'concern', and 'confirmed' comes from Latin 'confirmare', meaning 'to strengthen'.

'carefully' evolved from Middle English 'careful', and 'confirmed' evolved from Middle English 'confirmen', eventually becoming the modern English 'carefully-confirmed'.

Initially, 'carefully' meant 'full of care or concern', and 'confirmed' meant 'to make firm or strengthen'. Over time, 'carefully-confirmed' evolved to mean 'verified with great attention to detail'.