The kanji 式式 primarily conveys the meaning of "ceremony," "formula," or "style." It often implies a prescribed or formal way of doing something, a method, or a pattern. It can relate to events with established procedures or to a set of rules used to achieve a particular result.

・On-yomi (音読み): シキ (shiki) ・Kun-yomi (訓読み): None

⚫︎ 入学式 (にゅうがくしき) Translation: Entrance ceremony ⚫︎ 公式 (こうしき) Translation: Official; formal; formula ⚫︎ 数式 (すうしき) Translation: Mathematical formula

The kanji 式式 is a phono-semantic compound (形声文字; けいせいもじ). The semantic component is 弋, which represents an arrow, initially and originally symbolizing something being put into place. The phonetic component is 弋, which also represents the sound "shiki" or a similar sound in Old Chinese. Therefore, 式式 likely evolved to represent the concept of established procedures or formulas, similar to the setting of an arrow in the bow, or a fixed procedure.