N3 - 手段しゅだん
means, way, measure
N3 - 段だん
step, stair, flight of steps, grade, rank, level
N3 - 普段ふだん
usually, habitually, ordinarily, always
N2 - 一段といちだんと
greater, more, further, still more
N2 - 段階だんかい
gradation, grade, stage
N1 - 段々だんだん
gradually, by degrees