1. Without a sound
   - soundlessly, silently

See also: noiseless

• fusible metal
• fusiform
• fusil
• fusilier
• fusillade
• fusilli
• fusion
• fusion bomb
• fusion cooking
• fusion reactor
• fuss
• fuss-budget
• fussily
• fussiness
• fusspot
• fussy
• fustian
• fustic
• fustigate
• fustigation
• fustily
• fusty
• futhark
• futhorc
• futhork