'inconsistently-shown' originates from the combination of 'inconsistent' and 'shown', where 'inconsistent' comes from Latin 'inconsistens', meaning 'not standing firm', and 'shown' is the past participle of 'show', from Old English 'sceawian', meaning 'to look at'.

'inconsistently' evolved from the Latin 'inconsistens' through Middle English, and 'shown' from Old English 'sceawian', eventually forming the modern English term 'inconsistently-shown'.

Initially, 'inconsistent' meant 'not standing firm', and 'shown' meant 'to look at', but over time, 'inconsistently-shown' evolved to mean 'displayed without regularity'.