n.

1. 合成式皮箱（或皮箱）
   When he travels, he always carries with him a portmanteau.

   他旅行時一定帶著一個合成式皮箱。

2. 混成詞
   There are many portmanteau words in English- like "motel" is the combination of 'motor' and 'hotel.'

   英文中有許多混成詞，如 motel 就是 motor 和 hotel 的合成。

n.

1. a large travelling bag made of stiff leather and opening into two equal parts.
2. [as modifier] consisting of two or more parts, aspects, or qualities:
   a portmanteau movie.