dour /door or dowˈər/

1. Obstinate, determined
2. Sullen
3. Grim

• musths
• mustier
• mustiest
• mustily
• mustiness
• mustinesses
• musting
• must needs
• mustn't
• musts
• must-see
• musty
• Musulman
• mutabilities
• mutability
• mutable
• mutableness
• mutablenesses
• mutably
• mutagen
• mutageneses
• mutagenesis
• mutagenic
• mutagenicities
• mutagenicity