head-on
adjective [ before noun ], adverb uk/ˌhedˈɒn/ us/ˌhedˈɑːn/
（事故）迎头相撞的，正面相撞的
A head-on accident is one in which the fronts of two vehicles hit each other.
The car crossed the road and hit a truck head-on. 汽车横穿马路迎头撞上了一辆卡车。
a head-on collision 迎头相撞