earnest + -ness
earnestness (countable and uncountable, plural earnestnesses)
- The quality of being earnest; sincerity; seriousness.
- 22 March 2012, Scott Tobias, AV Club The Hunger Games
- She’s joined, on the boys’ side, by Peeta (Josh Hutcherson), a baker’s son whose earnestness masks a gift for strategy that Katniss lacks.