'annunciator' originates from Latin, specifically the word 'annuntiator', where the root 'annuntiare' meant 'to announce' and 'nuntius' meant 'messenger'.

'annunciator' changed from Latin 'annuntiator' (from 'annuntiare') and entered English via Ecclesiastical/Medieval Latin, eventually becoming the modern English word 'annunciator'.

Initially, it meant 'one who announces' (a person). Over time its meaning broadened to include mechanical or electronic devices that announce or indicate status (such as alarm panels), while retaining the sense of a human 'announcer' in some contexts.