Serious
Important
Synonyms Important, consequential, momentous, key, weighty, major, pressing, critical, life-and-death, no joke, careful, in-depth, profound, significant, of consequence, of moment, grave, far-reaching, urgent, crucial, vital, high-priority, no laughing matter, detailed, deep, and meaningful.
Solemn
Synonyms Solemn, grave, sombre, poker-faced, grim, humourless, thoughtful, deep in thought, meditative, contemplative, staid, studious, earnest, sober, unsmiling, stern, dour, stony-faced, preoccupied, pensive, ruminative, introspective, sedate, and bookish.
Intellectual
Synonyms Intellectual, heavyweight, profound, learned, cultured, heavy, highbrow, deep, literary, scholarly, and classical.
In earnest
Synonyms In earnest, sincere, genuine, committed, resolute, determined, earnest, wholehearted, meaning what one says, firm, and resolved.
Severe
Synonyms Severe, bad, acute, worrying, dreadful, dire, dangerous, precarious, grave, critical, alarming, grievous, terrible, extreme, perilous, and parlous.
Quality
Synonyms Considerable, substantial, significant, tolerable, reasonable, hefty, comfortable, worthwhile, worth taking into account, plentiful, superabundant, large, profuse, marked, not to be sneezed at, plenteous, sizeable, appreciable, goodly, fair, tidy, handsome, decent, worth having, ample, abundant, great, lavish, generous, noticeable, and OK.
Example Sentences
This is a serious problem.
She has a serious injury.
He’s serious about his goals.
The situation requires serious attention.
That’s a serious commitment to make.