seriousness

(noun) an earnest and sincere feeling. Synonyms: earnestness, sincerity.

(noun) the quality of arousing fear or distress. Synonyms: distressfulness. Example: "He learned the seriousness of his illness."

(noun) the trait of being serious. Synonyms: earnestness, serious-mindedness, sincerity. Example: "A lack of solemnity is not necessarily a lack of seriousness"- robert rice."