苦凉
[kŭ liáng]
'Bitter Coolness' can imply various meanings. It could be understood literally referring to a kind of flavor - bitter and cool. Metaphorically, this may also denote a personal state of feeling cold due to experiences in life which are bittersweet, hinting at the ups and downs of existence. Someone carrying such an ID might convey a sense of profound sorrow or loneliness that has cooled over time.