noun: Evenness of temper in all circumstances.
From Latin aequanimitas, from aequus (equal, even) + animus (mind, spirit).
"Even as a young netball star, Tharjini had no inflated opinion about herself nor did she ever take offence at the numerous teasing remarks or stares that her height drew. She met both celebrity status and silly remarks with equanimity."
-- Thulasi Muttulingam; A Player With Many Highs in Her Life; The Sunday Times (Colombo, Sri Lanka); Jul 12, 2009.