a. 紧闭嘴唇的, 寡言的
在线英汉词典

tight-lipped的短语、例句：

tight-lipped adj keeping the lips pressed firmly together,esp to restrain one´s emotion or to keep silent; grim-looking 双唇紧闭的（尤指克制感情或保持沉默）; 表情冷酷的.