1. Silent, not saying anything
   "Organized crime is thriving online but many victims want to keep stumm"
   - shtum, schtum, shtoom

Encyclopedia: Stumm

• chattering
• chattering classes
• chattily
• chattiness
• chatty
• Chaucer
• chauffeur
• chauffeuse
• chaulmoogra
• chaulmoogra oil
• chaulmoogra tree
• chaulmugra
• Chauna
• Chauna torquata
• chauvinism
• chauvinist
• chauvinistic
• chauvinistically
• chav
• Chavez
• chaw
• chawbacon
• Che Guevara
• cheap
• cheap money