Enter a clue or pattern or both:
The Clue
Evenness of temper (10 letter answer)
The Answer
EQUANIMITY
Tags
Notes
The answer EQUANIMITY is so rare that it appears less than once every 2500 puzzles.
Definition
EQUANIMITY as a noun:
1. (composure, calm, calmness, equanimity) = steadiness of mind under stress; "he accepted their problems with composure and she with equanimity"