without humor
- seriousWeighty and requiring attention
- solemnSerious and dignified
- sternStrict or ship's aft
- dryFree from moisture
- deadpanExpressionless, especially for humor
stoic · grim · humorless · dour · stony · grave · somber · stiff · wooden · poker-faced · dull · flat · mirthless · joyless · unfunny · cold · austere · earnest
personality disposition
without humorgood-humored
Cheerfully easygoing in temperament
fun · quick-witted · sharp-witted · irreverent · zany