a.

1. 口齿不清的；发音不清晰的
   an inarticulate cry

   含糊不清的喊声

2. （因激动等而）说不出话来的；不会说话的，哑的
   She was inarticulate with astonishment.

   她惊讶得说不出话来。

3. 难以言喻的；未表达出来的
   inarticulate passion

   内心的激情

4. 不善于清楚地表达的，不善辞令的
5. 【动】无关节的；无铰的

adj.

1. unable to express oneself clearly or easily.
   ▸not clearly expressed or pronounced.
2. without joints or articulations.