'unromantic' originates from the prefix 'un-' meaning 'not' and the word 'romantic', which comes from the Latin 'romanticus', meaning 'of the Roman style'.

'romanticus' transformed into the French word 'romantique', and eventually became the modern English word 'romantic', with 'un-' added to form 'unromantic'.

Initially, 'romantic' meant 'of the Roman style', but over time it evolved to mean 'characterized by romance', with 'unromantic' meaning the opposite.