'[carefully-controlled]' originates from the combination of 'carefully' and 'controlled'. 'Carefully' comes from 'care', which originates from Old English 'caru', meaning 'sorrow, anxiety, or concern'. 'Controlled' comes from the Latin 'contrarotulare', meaning 'to check against a roll'.

'Carefully' evolved from Middle English 'careful', and 'controlled' evolved from Middle English 'controllen', which was borrowed from Old French 'contreroller'.

Initially, 'carefully' meant 'full of care or concern', and 'controlled' meant 'checked or verified'. Over time, they combined to mean 'managed with precision'.