Silent

lautlos

(in silent mode, on silent, with the sound turned off)

leise

(in silent mode, on silent, with the sound turned off)

schweigen

(free from sound or noise; absolutely still; perfectly quiet)

schweigsam

(not speaking; indisposed to talk; speechless; mute; taciturn)

still

(free from sound or noise; absolutely still; perfectly quiet)

still

(keeping at rest; inactive; calm; undisturbed)

stumm

(not pronounced; having no sound; quiescent)

stumm

(in silent mode, on silent, with the sound turned off)