The term 'ETERNAL CITY INHABITANT' can be solved by the crossword solution 'ROMAN' (5 letters). The term refers to a resident of Rome, the capital of Italy and one of the oldest continuously inhabited cities in the world. Rome is often referred to as the Eternal City due to its long and rich history, spanning over two and a half thousand years. As such, the term 'ETERNAL CITY INHABITANT' is synonymous with 'ROMAN'.