The kanji 再 primarily conveys the idea of "again," "re-," "repeated," or "another time." It implies doing something a second time, a return, or a renewal of an action or state. This core meaning is central to its various applications.

・On-yomi (音読み): サイ (sai) ・Kun-yomi (訓読み): ふたたび (futatabi)

⚫︎再開（さいかい） Translation: Reopening; resumption ⚫︎再来年（さらいねん） Translation: The year after next ⚫︎再放送（さいほうそう） Translation: Rerun; rebroadcast

The kanji 再 is a pictograph. It depicts a tree (木) with two horizontal strokes added. The upper horizontal stroke indicates the idea of a "second time" or "again." The bottom horizontal stroke indicates the root of a tree. Thus, the formation represents the act of the tree growing again, which relates to a new start. The original form of the character might have looked like a tree with two markers on its trunk. Over time, the form was simplified.