At the party, everyone was talking about his new watch and that bottle of Hennessey.

Hennessey 是法国著名的干邑白兰地品牌名称，专指该品牌生产的优质烈酒。这个词本身是品牌名，没有特别的词根词缀构成，直接指代这个特定的酒类产品。