衰退期

すいたいき

phase of decline, ebb, twilight

衰退一途

すいたいいっと

(falling into a) continuous decline, being on the wane

老衰

ろうすい

senility, senile decay, infirmity (through age)

衰亡

すいぼう

ruin, downfall, collapse

衰死

すいし

becoming emaciated and die, wither away

減衰

げんすい

attenuation, damping, decay

衰滅

すいめつ

decline, downfall, ruin(ation)

盛衰

せいすい

rise and fall, ups and downs, welfare, vicissitudes

衰弱

すいじゃく

weakness, debility, breakdown, prostration

衰態

すいたい

weakened condition, state of decline

衰替

すいたい

weakening, declining

衰色

すいしょく

fading color, fading colour, fading beauty

衰微

すいび

decline, decadence, ebb tide

衰運

すいうん

declining fortunes, decadence

衰勢

すいせい

downward tendency, decay, decline

衰残

すいざん

emaciated, worn-out

五衰

five signs of the impending death of a heavenly being

衰世

すいせい

this decadent world

必衰

ひっすい

bound to decline, decay, or collapse