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