Restrained
Part of speech: adjective
Definition: Held back, limited, kept in check or under control.
Part of speech: verb
Definition: To control or keep in check.
Example sentence: One must learn, if one is to see the beauty in Japan, to like an extraordinarily restrained and delicate loveliness.
Unemotional
Part of speech: adjective
Definition: Showing little or no feelingReasoned and objective, involving reason or intellect rather than feelings