The word 行贿 is formed by combining the character 行, meaning "to carry out" or "to execute", with 贿, meaning "bribe" or "illicit gift". Together, they create a verb-object compound where 行 acts as the verb indicating the action, and 贿 serves as the object receiving that action, thus directly conveying the meaning "to carry out bribery" or "to offer a bribe".