'inappropriately-announced' originates from English, built from the adverb 'inappropriately' (from Latin 'in-' meaning 'not' + Medieval Latin 'appropriatus' meaning 'made proper/one's own' + the adverbial suffix '-ly') and the past participle 'announced' (from Old French 'anoncer/annoncer', from Latin 'annuntiare,' where 'ad-' meant 'to/toward' and 'nuntius' meant 'messenger').

'annuntiare' transformed into Old French 'anoncer/annoncer,' and eventually became the Middle English and modern English verb 'announce.' The adverb 'inappropriately' formed in English by adding the negative prefix 'in-' to 'appropriate' and the suffix '-ly.' The hyphenated compound adjective 'inappropriately-announced' arose by combining the adverb with the past participle to modify a following noun.

Initially, the components meant 'not proper' and 'declared,' and together they convey 'declared in a not proper way/time.' This sense has remained consistent in modern usage.