'preach' originates from Latin, specifically the word 'praedicare,' where 'prae-' meant 'before' and 'dicare' meant 'to proclaim.'

'praedicare' transformed into the Old French word 'precher,' and eventually became the modern English word 'preach' through Middle English.

Initially, it meant 'to proclaim or declare publicly,' but over time it evolved into its current meaning of 'to deliver a sermon or advocate a belief.'