He went off the road to avoid colliding with another car.
What is the function of the phrase "with another car"?
He went off the road to avoid colliding with another car.
What is the function of the phrase "with another car"?
Collide comes from Latin collidere, which itself is constructed from (a tweaked version of) the prefix com-, meaning with or together. Thus collide with another car isn’t too different from chat with another guest: both colliding and chatting are activities that involve two parties.
He went off the road to avoid colliding with another car.
with another car is a preposition phrase. It is adjectival and modifies the gerund-participle colliding.