不費吹灰之力 [ㄅㄨˋ ㄈㄟˋ ㄔㄨㄟ ㄏㄨㄟ ㄓ ㄌㄧˋ; bu4 fei4 chui1 hui1 zhi1 li4] as easy as blowing off dust effortless with ease ◄ ►