'unconcealed' originates from the prefix 'un-' meaning 'not' and the word 'concealed' from Latin 'concelare', where 'con-' meant 'together' and 'celare' meant 'to hide'.

'concealed' changed from the Latin word 'concelare' and eventually became the modern English word 'conceal', with 'unconcealed' forming as its antonym.

Initially, 'concealed' meant 'to hide', and 'unconcealed' evolved to mean 'not hidden'.