uncheerfulness

nouns

a feeling of dreary or pessimistic sadness
cheerlessness, uncheerfulness
is derived from
uncheerful
not conducive to cheer or good spirits
uncheerfulness
is derived from
uncheerful
antonym
cheerfulness
is a part of
your usual mood
"he has a happy disposition"
disposition, temperament
is a type of (narrower)
an abstraction belonging to or characteristic of an entity
attribute