The kanji 軸 represents a "pivot," "axis," or "shaft." It signifies a central point around which something rotates or the main supporting structure of an object. The concept is closely related to the idea of stability, centrality, and the core of something. It can also refer to the essence or crucial part of something.

・On-yomi (音読み): ジク (jiku) ・Kun-yomi (訓読み): None, as the meaning is almost always expressed using the ジク reading.

⚫︎ 軸足 Translation: Pivoting foot, supporting leg (in sports) ⚫︎ 中心軸 Translation: Central axis ⚫︎ 精神的軸 Translation: Mental axis / the core of one's spirit

The kanji 軸 is a phono-semantic compound (形声文字). The left side is 木 (ki) which means "tree" or "wood," and the right side is 由 (yuu) which originally represented a "vessel" or "cause," and later evolved to mean "reason." Combining these elements, 軸 illustrates a wooden core or central support, embodying the idea of stability and the center of rotation. Over time, it broadened to include the concepts of axis, pivot, and the core essence of something. The character's evolution reflects the importance of central supports in various aspects of life, from physical structures to abstract concepts.