deadly serious; deadly earnest
overserious; deeply sincere; very earnest
to become extremely serious (in attitude); to look solemn; to assume a solemn air
not serious; frivolous; insincere; unsteady
overly serious; serious to a fault; humorless
overserious; deeply sincere; very earnest
deadly serious; deadly earnest
overly serious; serious to a fault; humorless
not serious; frivolous; insincere; unsteady
to become extremely serious (in attitude); to look solemn; to assume a solemn air
overserious; deeply sincere; very earnest
overly serious; serious to a fault; humorless