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

Encyclopedia: Stumm

• flatulency
• flatulent
• flatus
• flatus-relieving
• flatware
• flatwork
• flatworm
• Flaubert
• flaunt
• flauntingly
• flaunty
• flautist
• Flavian dynasty
• flavin
• Flavius Claudius Julianus
• Flavius Josephus
• Flavius Theodosius
• Flavius Valerius Constantinus
• Flaviviridae
• flavivirus
• flavone
• flavonoid
• flavor
• flavorer
• flavorful