gravest

dignified dull earnest heavy muted quiet sage sedate sober subdued

cold sober deadpan dour grim grim-faced leaden long-faced meaningful no-nonsense ponderous sad saturnine solemn somber staid strictly business thoughtful unsmiling

agitated boisterous excited light lively trivial unimportant

cheerful frivolous funny happy inconsequential ridiculous silly

acute fell heavy killing major pressing threatening

afflictive consequential critical deadly destructive dire exigent fatal grievous hazardous important life-and-death momentous of great consequence ominous perilous serious severe significant ugly urgent vital weighty

insignificant little small trivial unimportant

cheerful frivolous funny happy inconsequential ridiculous silly