子供たちは丘を駆け下りた。

children

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

hill; height; knoll; rising ground; bonus points awarded to the winner at the end of a game

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 run (race, esp. horse); to dash; to gallop (one's horse); to canter; to advance (against one's enemy)

to descend (e.g. a mountain); to go down; to come down; to alight (e.g. from bus); to get off; to disembark; to dismount; to step down; to retire; to give up; to quit; to be granted; to be issued; to be given; to form (of frost, dew, mist, etc.); to be passed (from the body; e.g. of a roundworm)