皮-3 被Ⅰ(名) quilt Ⅱ(介) [introducing the agent in a passive sentence] by sth

被   被是形声字。衣为形符；皮为声符。《说文》注：“寝衣，长一身有半。”被本指被盖。作动词，又指覆盖。用于动词前作助词，表示主语是受动作支配之对象。被亦作介词用。

被Ⅰ(名) quilt Ⅱ(介) [introducing the agent in a passive sentence] by sth Ⅲ(助) used before a notional verb to indicate that the subject is the receiver.