adverb
not humorously
Synonyms: actively, all joking aside, cool it, cut the comedy, determinedly, down, earnestly, fervently, for real, gravely, in all conscience, in all seriousness, in earnest, intently, passionately, purposefully, resolutely, sedately, simmer down, sincerely, soberly, solemnly, sternly, straighten out, thoughtfully, vigorously, with a straight face, with forethought, with sobriety, zealously
Antonyms: funnily, lightly
adverb
dangerously, critically
Synonyms: acutely, badly, decidedly, deplorably, distressingly, gravely, grievously, harmfully, intensely, menacingly, perilously, precariously, quite, regrettably, severely, sorely, threateningly, very
Antonyms: casually, minor, trivially