also: いんしん
noun
correspondence; news; letter; tidings
Refers to communication, especially written letters or messages that convey news or updates. Often used in the phrase 音信不通 (no communication).
彼からは何の音信もない。
There has been no word from him at all.
音信不通の状
We have been out of touch for a while.
音 (sound, news) + 信 (message, trust). The combination originally referred to news or a message conveyed by sound or writing.