Antonyms of adj blithe

2 senses of blithe

Sense 1
blithe -- (lacking or showing a lack of due concern; "spoke with blithe ignorance of the true situation")

INDIRECT (VIA unconcerned) -> concerned -- (feeling or showing worry or solicitude; "concerned parents of youthful offenders"; "was concerned about the future"; "we feel concerned about accomplishing the task at hand"; "greatly concerned not to disappoint a small child")

Sense 2
blithe, blithesome, lighthearted, lightsome, light-hearted -- (carefree and happy and lighthearted; "was loved for her blithe spirit"; "a merry blithesome nature"; "her lighthearted nature"; "trilling songs with a lightsome heart")

INDIRECT (VIA cheerful) -> depressing, cheerless, 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")

Similarity of adj blithe

2 senses of blithe

Sense 1
blithe -- (lacking or showing a lack of due concern; "spoke with blithe ignorance of the true situation")
       => unconcerned (vs. concerned) -- (lacking in interest or care or feeling; "the average American...is unconcerned that his or her plight is the result of a complex of personal and economic and governmental actions...beyond the normal citizen's comprehension and control"; "blithely unconcerned about his friend's plight")

Sense 2
blithe, blithesome, lighthearted, lightsome, light-hearted -- (carefree and happy and lighthearted; "was loved for her blithe spirit"; "a merry blithesome nature"; "her lighthearted nature"; "trilling songs with a lightsome heart")
       => cheerful (vs. depressing) -- (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")