黙(だま)る

to become silent; to stop speaking

黙(だま)り込(こ)む

to become completely silent

沈黙(ちんもく)

silence; silence or lack of speech

黙読(もくどく)

silent reading

黙々(もくもく)

silently and diligently

黙秘(もくひ)

keeping silent; refusing to speak

黙認(もくにん)

tacit approval; overlooking

黙祷(もくとう)

silent prayer

図書館(としょかん)では、本(ほん)を黙読(もくどく)してください。

In the library, please read silently.

質問(しつもん)されても、彼(かれ)は黙(だま)る。

Even when asked, he stays silent.