衰 decline, wane, weaken 10 strokes jōyō, taught in secondary school old JLPT 1 #1432 in newspapers Readings Onスイ Kunおとろ.える In Chinese 衰 Words written with it 老衰 ろうすい senility N1 衰退 すいたい decline 衰え おとろえ weakening 衰弱 すいじゃく weakness 衰える おとろえる to become weak N1 古び衰える ふるびおとろえる to waste away 盛衰 せいすい rise and fall 減衰 げんすい attenuation