About
As a phono-semantic compound, 悌 is formed by the heart radical 忄 on the left, which indicates an emotional or psychological meaning, and the component 弟 on the right, which means "younger brother" and provides the character's pronunciation. Together, they convey the core concept of fraternal virtue, the respect and affection a younger sibling owes an elder brother within the traditional family structure. This idea is a key Confucian principle, often paired with filial piety to define the essential duties that uphold proper conduct and social order.
Etymology Hide