What does 一層 mean?
一層 is a Japanese adverb meaning “even more” or “all the more” in English. It is written as 一層 in kanji, いっそう in hiragana, and issou in romaji. This word is part of JLPT N3 vocabulary.
Example sentences
雨が一層強くなった。
The rain got even heavier.
これからも一層努力します。
I'll work even harder from now on.