Silent

беззву́чный

bezzvúčnyj

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

безмо́лвный

bezmólvnyj

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

молча́ть

molčátʹ

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

молчали́вый

molčalívyj

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

немо́й

nemój

(not pronounced; having no sound; quiescent)

непроизноси́мый

neproiznosímyj

(not pronounced; having no sound; quiescent)

ти́хий

tíxij

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