What does 熱中 mean?
熱中 is a Japanese noun meaning “enthusiasm, zeal, mania” in English. It is written as 熱中 in kanji, ねっちゅう in hiragana, and netchuu in romaji. This word is part of JLPT N3 vocabulary.
Example sentence
この頃は彼女はテニスに熱中している。
Nowadays she is lost in tennis.