Impact, Conflict
Noun and する verb
しょうとつ
高速道路で、車が次々と衝突しました。
On the highway, cars collided one after another.
To collide and stab into each other is to be in a collision or impact.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.