せいつう · seitsuu
thorough knowledge
JLPT N1 nounKanji in this word
Example sentences
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Kare wa shigoto ni seitsuu shi te i ta.
He acquainted himself with his job.
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Kanojo wa eigo ni seitsuu shi te iru.
She is quite at home in English.
Example sentences from the Tatoeba Project, CC-BY 2.0 FR.