词典释义：
a growth of hair on the chin and lower cheeks of a man's face
颏上的胡须，络腮胡子。
a tuft of hair on the chin of certain mammals, for example a lion or goat
（狮子或山羊等哺乳动物的）须，胡子。
an animal's growth or marking that is likened to a beard, for example the gills of an oyster, or the beak bristles of certain birds
（动物的）颔毛；（牡蛎的）鳃；（某些鸟类喙上的）须状羽毛。
a tuft of hairs or bristles on certain plants, especially the awn of a grass
（植物的）芒，髯毛。
〈北美，非正式〉 （在社交场合陪同男性同性恋者以掩饰其同性恋身份的）名义女伴。
〈美，非正式〉 替身（尤指代替他人作打赌等交易以便掩盖其身份的人）。
boldly confront or challenge (someone formidable)
对抗（令人畏惧的人），顶撞，冲撞。
-
beard the lion in his den （或lair ） confront or challenge someone on their own ground 在狮穴捋狮须，太岁头上动土
"Old English, of West Germanic origin； related to Dutch
