精通

せいつう

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

common word

Meaning

nvsvi
being well versed (in); being well acquainted (with); being familiar (with); having a thorough knowledge (of); being an authority (on)
nvsvi
(a boy's) first ejaculation; spermarche; semenarche

Example sentences

彼女は自分の専門のことに関して精通しているという評価を受けた。

She had a reputation for being well informed about her subjects.
彼女は英語に精通している。

She is quite at home in English.
彼は米文学に精通している。

He is at home in American literature.