RichThesaurus
nonpassionate
vs
unruffled
nonpassionate
adj
Not passionate.
unruffled
adj
Not ruffled or tousled.
Calm, not ruffled, serene, at peace, unbothered.
How often have the words
nonpassionate
and
unruffled
occurred in a corpus of books?
(source:
Google Ngram Viewer
)