衰 - decline, wane, weaken

weakening; emaciation; decline

weakness; debility; breakdown; prostration

decline; degeneration; decay; waning; ebbing

senility; senile decay; infirmity (through age)

to become weak; to decline; to wear; to abate; to decay; to wither; to waste away

rise and fall; ups and downs; welfare; vicissitudes

to waste away

weight decay

weakening; declining

decline and fall; ruin; downfall; collapse

inevitable decline (decay, collapse, etc.)

attenuation (factor, rate)