'equally' originates from Latin, specifically the word 'aequalis,' where 'aequus' meant 'level, even, just.' 'Split' originates from Middle English, specifically the word 'splitten,' which came from Old Norse 'splita,' meaning 'to cleave or divide.'

'equally' changed from the Latin word 'aequalis' and eventually became the modern English word 'equally.' 'Split' transformed from the Old Norse word 'splita' and eventually became the modern English word 'split' through Middle English.

Initially, 'equally' meant 'level or even,' but over time it evolved into its current meaning of 'in equal parts.' 'Split' initially meant 'to cleave or divide,' and this meaning has largely remained the same in modern usage.