'uniform' originates from Latin, specifically the word 'uniformis,' where 'uni-' meant 'one' and 'forma' meant 'form.' 'Rate' originates from Old French 'rate,' meaning 'fixed amount.'

'uniform' changed from the Latin word 'uniformis' and eventually became the modern English word 'uniform.' 'Rate' evolved from Old French 'rate' to the modern English 'rate.'

Initially, 'uniform' meant 'having one form,' and 'rate' meant 'fixed amount.' Over time, 'uniform-rate' evolved to mean 'consistent rate.'