expression, ichidan verb
offer a prize; put up a reward
Used when someone offers a monetary prize, often in the context of contests, competitions, or for capturing someone.
警察は犯人逮捕に賞金をかけた。
The police offered a reward for the arrest of the criminal.
そのコンテストでは優勝者に賞金を
They are putting up a prize for the winner of that contest.