What does 水平線 mean?
水平線 is a Japanese noun meaning “horizon” in English. It is written as 水平線 in kanji, すいへいせん in hiragana, and suiheisen in romaji. This word is part of JLPT N2 vocabulary.
Example sentence
太陽が水平線の下に沈んだ。
The sun sank below the horizon.