cheerful being full of or promoting cheer; having or showing good spirits; "her cheerful nature"; "a cheerful greeting"; "a cheerful room"; "as cheerful as anyone confined to a hospital bed could be"
cheerless,
depressing,
uncheerful causing sad feelings of gloom and inadequacy; "the economic outlook is depressing"; "something cheerless about the room"; "a moody and uncheerful person"; "an uncheerful place"
attribute an abstraction belonging to or characteristic of an entity
temperament,
disposition an adjustment of the intervals (as in tuning a keyboard instrument) so that the scale can be used to play in different keys
