The word "赏金" is formed by directly combining the character "赏", meaning to reward or bestow, with "金", meaning gold or money, to create a compound that literally conveys the concept of "reward money" or "bounty". This construction arises from the semantic fusion of the two characters, where "赏" indicates the action or purpose of giving a reward, and "金" specifies the tangible form of that reward, resulting in a term that inherently denotes a monetary prize offered for a service or achievement.