'painstakingly-fixed' originates from the combination of 'painstakingly' and 'fixed', where 'painstakingly' means 'with great care and thoroughness' and 'fixed' means 'repaired or corrected'.

'painstakingly' evolved from the word 'painstaking', which was used in Middle English to describe someone who takes pains or is diligent. 'Fixed' comes from the Latin 'fixus', meaning 'fastened'.

Initially, 'painstakingly' meant 'taking pains', but over time it evolved to mean 'with great care'. 'Fixed' has largely retained its meaning of 'repaired or corrected'.