一層 いっそう issou even more JLPT N3 adverb noun Common word Other meanings 2. one layer 3. lowest floor (of a building) The kanji in this word 一 one JLPT N5 · Strokes 1 層 stratum, social class, layer JLPT N2 · Strokes 14 In this level いつか 一家 一種 一瞬 一生 一体 一致 いつでも いつの間にか 一般 Back to the JLPT N3 list Practise these words