The kanji 績 primarily conveys the meaning of "achievement," "performance," "merit," or "spinning." It often relates to the results of one's efforts, accomplishments, or the quality of work. It can also refer to the thread or strands produced in the process of spinning.

・On-yomi (音読み): せき (seki) ・Kun-yomi (訓読み): な・す (na.su) - to achieve, to accomplish (less common)

⚫︎ 成績（せいせき） Translation: Results; grades; performance ⚫︎ 実績（じっせき） Translation: Achievements; actual results ⚫︎ 業績（ぎょうせき） Translation: Business results; achievements; performance

The kanji 績 is a phono-semantic compound (形声文字, keisei moji). It combines the radical 糸 (いと, ito) meaning "thread" or "silk" with the phonetic character 責 (せき, seki), which originally meant "to blame" or "to demand." The combination suggests the idea of examining thread quality, and by extension, assessing the "results" or "achievements" as a whole. Over time, the meaning broadened to encompass a wider range of accomplishments and performance.