JMdict: 1380100

精通 【せいつう】

  1. [n,vs,vi] being well versed (in); being well acquainted (with); being familiar (with); having a thorough knowledge (of); being an authority (on)
  2. [n,vs,vi] (a boy's) first ejaculation; spermarche; semenarche
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Kanji in this word:

Kanji Meanings On Readings Kun Readings
精 Refined, Ghost, Fairy, Energy, Vitality, Semen, Excellence, Purity, Skill セイ, ショウ しら.げる, くわ.しい
通 Traffic, Pass Through, Avenue, Commute, Counter For Letters, Notes, Documents, Etc. ツウ, ツ とお.る, とお.り, -とお.り, -どお.り, とお.す, とお.し, -どお.し, かよ.う