The core meaning of the kanji 於於 is "at," "in," "on," or "to," indicating a location, position, or point of reference. It often implies a specific place or circumstance where something happens or exists. It can also denote the beginning or end point of something.

・On-yomi (音読み): オ ・Kun-yomi (訓読み): お

⚫︎図書館於 Translation: At the library. ⚫︎会議於 Translation: In the meeting. ⚫︎東京於 Translation: In Tokyo.

The kanji 於於 originated from a pictograph representing a hand grasping something. It later developed to mean "at" or "in" something. The character has evolved over time, but its core meaning of location or reference has remained consistent.