It literally translates to "being in darkness" or "being in the dark," which metaphorically represents the feeling of sadness or gloom.
Here are some examples of how "kei te pouri" can be used:
* Kei te pouri ahau. (I am sad.)
* Kei te pouri ahau mo te mate o taku hoa. (I am sad about the death of my friend.)
* Kei te pouri te rangi. (The sky is gloomy.)
It's important to note that "kei te pouri" can be used to describe a general feeling of sadness or gloom, but it can also be used to describe a specific sadness related to a particular event or situation.