彼はボールを投げつけた。

he; him; his; boyfriend

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

hall (dance, concert, etc.); hole; whole; dining area of a restaurant

indicates direct object of action; indicates subject of causative expression; indicates an area traversed; indicates time (period) over which action takes place; indicates point of departure or separation of action; indicates object of desire, like, hate, etc.

to throw at; to throw something at a person; to throw a person down