'covertly' originates from Old French, specifically the word 'covrir,' where 'covert' meant 'hidden or secret.' 'Announce' comes from Latin, specifically the word 'annuntiare,' where 'ad-' meant 'to' and 'nuntiare' meant 'to report.'

'Covrir' transformed into the Middle English word 'coverte,' and eventually became the modern English word 'covert.' 'Annuntiare' transformed into the Old French word 'anoncer,' and eventually became the modern English word 'announce.'

Initially, 'covert' meant 'hidden or secret,' and this meaning has largely remained the same in modern usage. 'Announce' initially meant 'to report or declare,' and this meaning has largely remained the same in modern usage.