Equanimous

Adjective

e=quan=i=mous

WORDNET DICTIONARY

equanimous(s = adj.all) collected, poised, self-collected, self-contained, self-possessed - in full control of your faculties; "the witness remained collected throughout the cross-examination"; "perfectly poised and sure of himself"; "more self-contained and more dependable than many of the early frontiersmen"; "strong and self-possessed in the face of trouble"

Derived form noun equanimity₁

Equanimous, a. [L. aequanimus, fr. aequus equal + animus mind.].

Of an even, composed frame of mind; of a steady temper; not easily elated or depressed. Bp. Gauden. [1913 Webster]