weakness

decline

neurasthenia ②concentration (card game involving turning over face-down cards to find identical pairs)

senility

death from prostration

rise and fall

inevitable decline (decay, collapse, etc.)

ups and downs of life

attenuation

decline

decline and fall

psychasthenia

attenuator

declining fortunes

emaciated body

emaciated

becoming emaciated and die

fading color

this decadent world

downward tendency

to become weak

weakening

to become emaciated

to waste away

to languish

to be utterly spent or crushed