'deliberate' originates from Latin, specifically the word 'deliberatus,' where 'de-' meant 'down' and 'liberare' meant 'to weigh or balance.' 'Apply' originates from Latin, specifically the word 'applicare,' where 'ad-' meant 'to' and 'plicare' meant 'to fold.'

'deliberatus' transformed into the Old French word 'deliberer,' and eventually became the modern English word 'deliberate.' 'Applicare' transformed into the Old French word 'appliquer,' and eventually became the modern English word 'apply.'

Initially, 'deliberate' meant 'to weigh or consider carefully,' but over time it evolved into its current meaning of 'intentional.' 'Apply' initially meant 'to fold or attach,' but evolved to mean 'to put into use or effect.'