refoulement
noun
[ rəˈfuːlmɒ̃ ]
• the forcible return of refugees or asylum seekers to a country where they are liable to be subjected to persecution.
• "international and EU law prohibit refoulement"
Origin:
mid 19th century (in sense ‘an instance of water being forced back into the channel of a river’): French, from refouler ‘push or force back’.