mouthless

1. She's the smileless ( well, mouthless) Mona Lisa.
   她就是没有微笑（好吧，其实是没有嘴巴）的蒙娜丽莎。
2. So how did a mouthless cat with no story line become an international brand sensation?
   一只没有嘴巴，没有故事的猫是怎样变成国际知名品牌的呢？

adj

1. having no mouth or mouthlike opening

   Synonym:    astomatous