To hit or strike against something; to knock into; to crash into (applying force against a target, e.g. hitting one's head or crashing a car into something).
自転車で電柱にぶつけてしまった。
I ended up hitting a utility pole with my bicycle.
階段で頭をぶつけて痛かった。
I bumped my head on the stairs and it hurt.
彼は車を塀にぶつけてボディをへこませた。
He hit the wall with his car and dented the body.
To throw or fling something at someone/something; to hurled at a target.
子どもがわざとボールを窓にぶつけた。
The child intentionally threw a ball at the window.
彼は石を犬に向かってぶつけた。
He threw a stone at the dog.
腹が立ってコップを床にぶつけた。
In anger, he smashed the glass down on the floor.
To vent or direct one's feelings at someone; to express emotions or questions forcefully toward someone.
彼女は上司に怒りをぶつけた。
She directed her anger at her boss.
試験に落ちて友達に不満をぶつけてしまった。
Having failed the exam, I took my frustrations out on my friend.
記者が次々と質問をぶつけた。
Reporters fired question after question at him.
To pit someone (or something) against another; to set/put against; to match against (e.g., putting a player up against an opponent).
監督は新人投手を相手チームのエースにぶつけた。
The coach put the rookie pitcher up against the opponent's ace.
強豪チームに若手をぶつけるのは難しい挑戦だ。
Putting a young player against a top team is a tough challenge.
会社は新製品をライバル会社の主力商品にぶつけて販売戦略を立てた。
The company positioned its new product against the rival's main product as a sales strategy.