'inconsistently-documented' is a compound word formed from 'inconsistent' and 'documented'. 'Inconsistent' originates from Latin, specifically the word 'inconsistens', where 'in-' meant 'not' and 'consistens' meant 'standing firm'. 'Documented' comes from Latin 'documentum', meaning 'example, proof'.

'inconsistens' transformed into the English word 'inconsistent', and 'documentum' evolved into 'documented'. The combination of these words formed the modern term 'inconsistently-documented'.

Initially, 'inconsistent' meant 'not standing firm', and 'documented' meant 'recorded as proof'. Over time, 'inconsistently-documented' evolved to describe something recorded without uniformity.