'premeditatedly' originates from Latin, specifically the word 'praemeditari,' where 'prae-' meant 'before' and 'meditari' meant 'to think or consider.'

'praemeditari' transformed into the Old French word 'premedité,' and eventually became the modern English word 'premeditatedly' through Middle English.

Initially, it meant 'to think or consider beforehand,' and this meaning has largely remained the same in modern usage.