rán originally named the long cheek-whiskers extending below the jaw, but in modern usage it generally refers to any full beard, especially a long, flowing, dignified one. Key compounds:
美髯 (handsome beard),
美髯公 (the 'Beautiful Beard' - Guan Yu's epithet in Three Kingdoms),
虬髯 (curly thick beard, associated with the Tang martial-arts story 《
虬髯客传》),
白髯 (white beard of an old sage).