barb

barb
/bɑ:b; bɑrb/ n
1 point of an arrow, a fish-hook, etc curved backwards to make it difficult to pull out （箭、鱼钩等的）倒钩. =>illus at hook 见hook之插图.
2 (fig 比喻) hurtful remark 伤人的话
    cruel barbs of ridicule 挖苦人的刺耳言语.

牛津英汉双解词典