専門
Kana: せんもん
specialized
Example sentence
彼は日本語の専門家です。
かれはにほんごのせんもんかです。
He is a specialist in Japanese.
What 専門 means
専門 (せんもん) is a Japanese word meaning “specialized”. It appears in the Level 3 collection, under Describing Words (and also in Level 4).