'compact' originates from Latin, specifically the word 'compactus,' where 'com-' meant 'together' and 'pactus' meant 'fastened.' 'Focus' originates from Latin, specifically the word 'focus,' meaning 'hearth' or 'fireplace,' which evolved to mean 'center of activity or interest.'

'compactus' transformed into the French word 'compacter,' and eventually became the modern English word 'compact' through Middle English. 'Focus' retained its form from Latin to modern English.

Initially, 'compact' meant 'fastened together,' but over time it evolved into its current meaning of 'small and efficient.' 'Focus' initially meant 'hearth,' but evolved to mean 'center of interest.'