共通祖先 きょうつうそせん Meanings Noun common ancestor Kanji 共 together. Read as キョウ. 通 pass through. Read as ツウ. 祖 ancestor 先 ahead. Read as セン. Words containing 共通祖先 最も近い共通祖先 (もっともちかいきょうつうそせん) most recent common ancestor Jinuma: Japanese Dictionary · Word lists