1. Without speaking
   - mutely, wordlessly, taciturnly 
2. Without a sound
   - noiselessly, soundlessly

See also: silent

• Seth Thomas
• setline
• setoff
• Seton
• Setophaga
• Setophaga ruticilla
• setose
• setscrew
• Setswana
• sett
• settee
• setter
• setterwort
• setting
• setting hen
• settle
• settle down
• settle on
• settled
• settlement
• settlement house
• settler
• settling
• settlings
• settlor