noun
silent phone call; nuisance call with no one speaking
A form of harassment where the caller stays silent, often causing unease or fear. The term is commonly used in discussions of stalking and phone-based intimidation.
深夜に無言電話がかかってきて怖かった。
I got a silent phone call late at night and it scared me.
無言電話はストーカー行
Silent phone calls are sometimes considered a form of stalking.