head-on >> ˌhɛdˈɒn
Definition: [adjective] involving the front of a vehicle or vehicles.
Example: a head-on collision
Definition: [adjective] directly confrontational.
Example: he was trying to avoid a head-on clash
Definition: [adverb] with the front of a vehicle.
Example: they hit a bus head-on
Definition: [adverb] with direct confrontation.
Example: she's a serious writer who frequently tackles social issues head-on