Another word for solemn?

Solemn means serious, quiet, and has a similar meaning to austere, brooding, cold, deliberate, dignified, downbeat, earnest, somber, sober, funereal, glum, grave, intense, heavy, moody, no fooling, no-nonsense, pensive, portentous, reflective, sedate, stern, thoughtful, weighty, matter of life and death, and staid.