The kanji 朱 primarily represents the color vermilion, a vibrant reddish-orange pigment. It can also refer to things that are that color. Think of it as the color of cinnabar, a naturally occurring mineral.

・On-yomi (音読み): シュ (shu) ・Kun-yomi (訓読み): あけ (ake) – meaning “vermilion” or “red color”, usually used in older contexts or as part of a compound word.

⚫︎朱色 Translation: Vermilion color ⚫︎朱肉 Translation: Red ink (used for seals) ⚫︎朱筆 Translation: Red pen (used for corrections or emphasis)

The kanji 朱 is a pictograph. The original form of the character depicted a tree trunk with a dot representing the color red. Over time, the form evolved. The top part represents the tree trunk, and the bottom part now appears as a small dot, indicating the vermillion color. It evolved from depicting a tree trunk stained red.