U+5FEB "快" CJK Unified Ideograph-# Unicode Character

U+5FEB "快" CJK Unified Ideograph-# is a foundational Chinese character traditionally meaning "fast," "quick," or "rapid," and is also commonly used to express happiness or pleasure, as in the word "快乐" (kuài lè) for "happy." Composed of the radical "忄" (heart) on the left and "夬" (guài) on the right, its original form suggested a joyful heart or a sense of swift resolution. In modern usage, it appears in a wide range of contexts, from describing speed in phrases like "快速" (fast speed) to emotional states such as "愉快" (joyful). This character is encoded in the CJK Unified Ideographs block of Unicode, supporting its use across digital platforms for Chinese, Japanese, and Korean languages, where it retains similar meanings of quickness or delight.