sullen /sulˈən/

1. Gloomily angry and silent
2. Malignant, baleful
3. Dull, dismal

Sullenly

• gashes
• gashest
• gashful
• gashing
• gashliness
• gashlinesses
• gashly
• gasholder
• gasholders
• gasification
• gasifications
• gasified
• gasifier
• gasifiers
• gasifies
• gasiform
• gasify
• gasifying
• gas jar
• gas jars
• gas jet
• gas jets
• gasket
• gaskets
• gaskin