'proclaimable' originates from Latin, specifically the word 'proclamare,' where 'pro-' meant 'forth' and 'clamare' meant 'to shout'. The adjectival suffix '-able' comes ultimately from Latin '-abilis' via Old French/Anglo-Norman.

'proclaimable' derives from the verb 'proclaim', which entered English via Old French 'proclamer' and Middle English 'proclamen', and later combined with the productive suffix '-able' to form the adjective 'proclaimable'.

Initially, the root meant 'to call out, shout forth' in Latin; over time it evolved into the sense 'to announce or declare publicly', and 'proclaimable' now means 'able to be announced or declared'.