The kanji 懐懐 primarily conveys the meanings of "bosom," "breast," "heart," "nostalgia," and "to miss." It often refers to the physical space of the chest, as well as the emotional space of the heart and the feelings associated with it. The character can also imply a sense of closeness, familiarity, and a warm, inviting feeling.

・On-yomi (音読み): カイ (kai) ・Kun-yomi (訓読み): ふところ (futokoro), なつ-かしい (natsuka-shii)

⚫︎懐かしい思い出 Translation: Nostalgic memories ⚫︎胸に懐を抱く Translation: To hold something close to one's heart/bosom. (Figuratively: To have a secret or to hide something) ⚫︎財布を懐に入れる Translation: To put one's wallet in one's bosom/inside pocket.

The kanji 懐懐 is a phono-semantic compound (形声文字). The radical is 忄 (りっしんべん - "heart" or "mind"), which provides the semantic component (meaning). The phonetic component is 𢓜 (which is a component of a different kanji and has a similar sound "kai"). The whole character, therefore, suggests something related to the heart or mind, and the pronunciation is borrowed from a character that resembles the sound. The original meaning relates to the bosom or chest, where the heart is. The shape of the character shows a person holding something close. Over time, it developed the broader meanings associated with emotions and the heart.