At first (= dapprima) the Romans were frightened (scared = spaventati) by Celtic people: they were very tall, pale (white = pallidi) and blond. They looked very different from Mediterranean people. Most of them had no beard (=barba), the nobles had big moustache (= baffi).
In battles most of the tribes fought naked (= nudi), only with their arms. Others wore trousers and light cloaks (= mantelli) because they did not want to be obstacles by clothes during the battle.