U+6B9A "殚" CJK Unified Ideograph-# Unicode Character

U+6B9A "殚" CJK Unified Ideograph-# is a Chinese character that primarily means "to exhaust" or "to use up" and is often used in classical or formal contexts to convey the idea of expending all resources or energy. Specifically, it carries the nuance of complete depletion, frequently appearing in phrases like "殚精竭虑" which means to rack one's brains or to think through thoroughly. The character belongs to the radical "歹" which relates to death or decay, and its phonetic component is "单" suggesting its pronunciation as "dān" in Mandarin.