Demeanour adjectives are listed in this post. Each word below can often be found in front of the noun demeanour in the same sentence. This reference page can help answer the question what are some adjectives commonly used for describing DEMEANOUR.
altered, calm, cheerful, courteous, dignified, friendly
general, gentle, gentlemanly, graceful, gracious, grave
haughty, humble, insolent, like, lofty, majestic
mild, modest, noble, outward, own, peaceable
personal, quiet, reserved, respectful, reverent, solemn
staid, usual, whole
Hope this word list had the adjective used with demeanour you were looking for. Additional describing words / adjectives that describe / adjectives of various nouns can be found in the other pages on this website.