'annunciable' originates from Latin, specifically the verb 'annuntiare' (later spelled 'annunciare'), where the prefix 'ad-' (in assimilated form 'an-') meant 'to' and 'nuntiare' (related to 'nuntius') meant 'to report' or 'to bring a message'.

'annunciable' developed in English by combining the verb 'annunciate/announce' (which entered English via Old French from Latin 'annuntiare') with the adjectival suffix '-able' borrowed from French/Latin formations; thus the modern English adjective arose through regular derivation in post-medieval English.

Initially the Latin root carried the sense 'to report or bring a message'; over time derivative English forms shifted toward the modern adjectival sense 'capable of being announced' or 'suitable for announcement'.