sullen /sulˈən/

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

Sullenly

• extemporise
• extemporised
• extemporises
• extemporising
• extemporization
• extemporize
• extemporized
• extemporizes
• extemporizing
• extend
• extendabilities
• extendability
• extendable
• extendant
• extended
• extended credit
• extended credits
• extended families
• extended family
• extendedly
• extended memory
• extended-play
• extender
• extenders
• extendibilities