The word "放出" is formed by combining two independent characters, each contributing its core meaning to create a new, composite idea. The first character, 放, carries the fundamental meaning of "to release" or "to let go". It is then directly paired with the second character, 出, which means "out" or "to exit". Their combination proceeds in a logical sequence, where the action of releasing (放) is directed toward the specific result of moving outward (出), thus naturally forming the concept of "to release out", "to emit", or "to discharge".