- lily-livered (adj.)
[lily-livered 词源字典]
- "cowardly," 1605, in "Macbeth;" from lily (in its color sense of "pale, bloodless") + liver (n.1), which was a supposed seat of love and passion. A healthy liver is typically dark reddish-brown.[lily-livered etymology, lily-livered origin, 英语词源]