Evenness means an equality between two species, or to sets of variables in mathematics, so evenness of mind and temper would be a tranquility or peace between these two parts of your body.
A ten letter word with this meaning is Equanimity.
Definition: mental calmness, composure, and evenness of temper, especially in a difficult situation.
An adjective describes a noun, so, it tells more about it. An adjective tells<span> which one, what kind, or how many. </span>
Hi again! You are correct, 100%!
Also, I'm currently using that same program for summer school right now, lol