noun
Refers to a loud, often emotional vocal outburst, such as yelling or shouting. Can be used for a single cry or a collective outcry.
彼のわめき声が部屋中に響いた。
His yell echoed throughout the room.
抗議のわめき声が広場から聞こえた。
Shouts of protest could be heard from the square.
Compound of わめき (continuative form of わめく 'to yell, to shout') + 声 (こえ 'voice'). The verb わめく is of native Japanese origin, likely onomatopoeic.