The kanji 悌 primarily conveys the meaning of "filial piety" or "brotherly respect and obedience." It refers to the virtue of being respectful and obedient towards elders, especially parents and siblings, and acting in a manner that honors them. It emphasizes harmony and respect within a family.

・On-yomi (音読み): ・tei (テイ) ・Kun-yomi (訓読み): ・yas(u) - It's used as a verb stem to show respect and obedience.

⚫︎悌愛 (teiai) Translation: Filial love; affection between siblings. ⚫︎悌順 (teijun) Translation: Filial piety and obedience. ⚫︎父に悌する (chichi ni tei suru) Translation: To be dutiful to one's father.

The kanji 悌 is a phono-semantic compound (形声文字). ⚫︎The semantic component is 忄(りっしんべん-ricshinben), which is the radical meaning "heart" or "mind". This element provides the meaning context. ⚫︎The phonetic component is 弟 (dai/dei, meaning "younger brother"). This provides the sound and the concept of relatedness or connection within the family. ⚫︎The combination suggests that the "heart" or "mind" (virtuous attitude) should act as a younger sibling (respectfully and obediently) to older siblings and/or elders.