noun
Refers to a monetary reward offered for achieving something, such as winning a contest or providing information leading to an arrest.
そのコンテストの懸賞金は100万円です。
The prize money for that contest is one million yen.
警察は犯人逮捕に懸
The police offered a reward for the arrest of the criminal.
Compound of 懸賞 (prize contest) and 金 (money). The exact historical derivation is uncertain, but the word is transparently formed from these elements.