The term 'Ancient Road to Rome' refers to the Appian Way, an ancient Roman road that was constructed in 312 BC. It was the first long-distance road built in Italy and connected Rome to Brindisi on the Adriatic coast. The Appian Way was named after Appius Claudius Caecus, the Roman censor who ordered its construction. The Latin word for this road is 'Iter, ' which is the answer to the crossword puzzle.