The act of remaining silent (especially in the face of questioning or investigation); not revealing information or testimony. Often used as 「黙秘する」.
逮捕された彼は最後まで黙秘を続けた。
The man who was arrested remained silent until the end.
記者の問いに対して、政治家は黙秘を選んだ。
Faced with reporters' questions, the politician chose to remain silent.
詳しい事情は黙秘しておくつもりだ。
I intend to keep the details to myself.