音おん信しん不ふ通つう

noun

no communication; out of touch; not hearing from someone

Describes a state where contact has been lost, typically with someone who is not responding or whose whereabouts are unknown. Often used in formal or serious contexts.

• 彼かれとは音おん信しん不ふ通つうになってしまった。

  I've lost contact with him.

• 音おん信しん不ふ通つうの状じょう態たいが続つづいている。

  The state of no communication continues.