noun, noun or participle which takes 'suru'
long silence; no contact for a long time
Used for a prolonged absence of communication, either literal silence or not getting in touch. Often implies a worrying or notable lack of contact.
彼からは一ヶ月も無音だ。
I haven't heard from him for a whole month.
無音のまま年を越した。
The year ended without any word from them.