IPA: /ˈsʌl.kɪ.nəs/
KK: /ˈsʌl.kɪ.nəs/
The state of being unhappy, quiet, and refusing to talk or be cheerful, often because of disappointment or annoyance.
Her sulkiness was evident when she didn't want to join the party.
Sulkiness → It is formed from "sulk" (from Middle English *sulken*, meaning to be silent or gloomy) and the suffix "-ness" (meaning the state or quality of). The word "sulkiness" refers to the state of being sulky or in a gloomy mood.
Think of someone being in a 'gloomy' state ('sulk') and the '-ness' indicating a quality. This helps you remember that sulkiness is the quality of being sulky.