The kanji 追追 primarily means "to chase," "to follow," or "to pursue." It implies the action of going after something or someone, with the intention of catching up, reaching, or obtaining it. It also conveys the sense of adding something later or supplementing.

・On-yomi (音読み): ツイ (tsui) ・Kun-yomi (訓読み): お追う (ou - to chase, to pursue)

⚫︎ 犯人を追う Translation: To chase a criminal. ⚫︎ 夢を追う Translation: To pursue a dream. ⚫︎ 追加料金 Translation: Additional charge.

The kanji 追追 is a phono-semantic compound (形声文字). The left side is a radical called 辶 (しんにょう - shinnnyou), which indicates movement, related to road or walking. The right side is 隹 (ふるとり - futori), which is a component that represents a short-tailed bird. Originally, the right side may have acted as the phonetic component, suggesting the sound "tsui." The combination represents the act of following, chasing, or pursuing something that moves, like the action of following a bird.