solemn
I
adjective
august, awe-inspiring, awesome, ceremonial, ceremonious, devotional, devout, earnest, formal, funereal, gloomy, grave, gravis, grim, hallowed, holy, imposing, impressive, majestic, meditative, mirthless, mournful, pensive, quiet, reflective, religious, reverential, ritual, sacramental, sacred, sanctified, sedate, serious, severus, sober, somber, spiritual, staid, stately, stern, stirring, subdued, tristis, venerable, worshipful
II
index
critical (crucial), earnest, important (significant), major, sacrosanct, serious (grave)
Burton's Legal Thesaurus.
William C. Burton.
2006