What does 四千 mean?
四千 is a Japanese noun meaning “four thousand” in English. It is written as 四千 in kanji, よんせん in hiragana, and yonsen in romaji. This word is part of JLPT N5 vocabulary.
Example sentence
飛行機は四千フィートまで上昇した。
The plane climbed to 4,000 feet.