Strangled To Death, Strangling
Noun and する verb
こうさつ
「あんた、もう少しであの男を絞殺しかけたのよ！」「ごめん。やりすぎたよ。」
"You almost strangled that guy to death!" "I’m sorry. I went too far."
A strangle kill is when you are strangled to death. Try to avoid this.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.