What does 瀬 mean?
瀬 is a Japanese noun meaning “shallows, a shoal” in English. It can also be translated as “rapids, a swift current” depending on context. It is written as 瀬 in kanji, せ in hiragana, and se in romaji. This word is part of JLPT N2 vocabulary.
Example sentence
人生沈む瀬あれば浮かぶ瀬あるわけだから、あまりくよくよしないように。
Don't be so glum about it. Life has its ups and downs.