The kanji 亘 primarily conveys the idea of "across," "through," or "spanning." It suggests something that extends over a distance, time period, or area, connecting two points or encompassing something. It can also imply continuity or prevalence.

・On-yomi (音読み): コウ (kō) ・Kun-yomi (訓読み): わた（る） (wata(ru))

⚫︎ 亘古 Translation: Eternity, for ages. ⚫︎ 相亘 Translation: Across each other, mutually, interchangeably. ⚫︎ 亘り Translation: Spanning (something).

The kanji 亘 is a pictograph. It depicts a horizontal line above and below. The top line represents sky or heaven, and the bottom line represents the earth. The line in the middle depicts something passing across, spanning the space between the heaven and the earth. Over time, the middle line has changed and has become the symbol known today.