精根 せいこん Meanings Noun energy; vitality; mental determination Kanji 精 spirit. Read as セイ. 根 root. Read as コン. Example sentences 精根尽きました。I have nothing left in me. Words containing 精根 精根尽き果てる (せいこんつきはてる) to use up all of one's energy and willpower Jinuma: Japanese Dictionary · Word lists