せいつう

精通

表記・読み：せいつう

1. 1

   being well versed (in); being well acquainted (with); being familiar (with); having a thorough knowledge (of); being an authority (on)

   名詞noun or participle which takes the aux. verb suru自動詞
2. 2

   (a boy's) first ejaculation; spermarche; semenarche

   名詞noun or participle which takes the aux. verb suru自動詞