nga rgyal - Pride

nga is me. rgyal means king. Thus, nga rgyal is 'me king', or the word for pride. It's easy to see the connection between the single words and the actual term.
So, if someone is very self-centric, the wisdom of equanimity is impure, if one is no longer self-centric, the wisdom of equanimity is shining.
Next, the dhyani Buddha associated with this wisdom.