They were caught trying to smuggle priceless artwork out of the country.

smuggle 是动词，意思是"非法偷运、走私"，指秘密地将违禁品或受管制物品运入或运出某个国家或地区，通常是为了逃避关税或法律限制。这个词常与毒品、武器、文物等贵重物品的非法运输相关。