JMdict: 1561120

老衰 【ろうすい】

  1. [n,vs,vi,adj-no] senility; senile decay; infirmity (through age)
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Kanji in this word:

Kanji Meanings On Readings Kun Readings
老 Old Man, Old Age, Grow Old ロウ お.いる, ふ.ける
衰 Decline, Wane, Weaken スイ おとろ.える