freedom of movement(the right of a citizen to travel within a state, and to leave and return to that state) noun [UK: ˈfriː.dəm əv ˈmuːv.mənt] [US: ˈfriː.dəm əv ˈmuːv.mənt]
行動自由論者 noun
libertarian(one who advocates liberty) noun [UK: ˌlɪ.bə.ˈteə.riən] [US: ˌlɪ.bər.ˈte.riən]