the.com/seriousness
The art of frowning so the room agrees you mean it.
means The quality of being earnest, weighty, or grave — treating something as important rather than a joke.
from From Latin serius, meaning weighty or grave, arriving in English via Old French in the 1400s — the heavy cousin of every lighter mood.
Mock versionSolemnity can be performed without sincerity underneath.
Health linkExcessive seriousness correlates with higher stress markers.
Comedy's foilHumor depends on seriousness to subvert.