jmdict
1380100
Active
(id:
2209667)
精通 [せいつう] /(n,vs,vi) (1) being well versed (in)/being well acquainted (with)/being familiar (with)/having a thorough knowledge (of)/being an authority (on)/(n,vs,vi) (2) (a boy's) first ejaculation/spermarche/semenarche/(P)/EntL1380100/