'upkeep' originates from Middle English, specifically the combination of 'up' and 'keep', where 'up' meant 'in a higher position' and 'keep' meant 'to maintain'.

'upkeep' changed from the Middle English word 'upkep' and eventually became the modern English word 'upkeep'.

Initially, it meant 'to maintain something in a higher position', but over time it evolved into its current meaning of 'maintaining something in good condition'.