Old and physically or mentally weak; to grow old or deteriorate with age

The extreme weakening or loss of physiological function in a body organ; exhaustion; prostration

to become weaker or less effective; to fail; to drop

To lose power, prosperity, or strength; to go downhill or deteriorate.

heart failure or cardiac insufficiency

heart failure; a medical condition where the heart is unable to pump enough blood to meet the body's needs

to weaken, diminish, or decline in strength, power, or value (e.g., of physical forces, electronic signals, or resources)

prosperity and decline; rise and fall; ups and downs; vicissitudes

neurasthenia; nervous exhaustion; a condition of nervous system dysfunction often involving symptoms like fatigue, headache, memory loss, and anxiety, and sometimes used to describe clinical depression

feeble or weak; lacking strength or vitality

to decline; to wane; to decay; to deteriorate; to be in a state of ruin

The time required for half of the atoms in a radioactive substance to decay; also known as [[半生期|半生期|ban4 sheng1 qi1]], [[半化期|半化期|ban4 hua4 qi1]], or [[半寿期|半壽期|ban4 shou4 qi1]].

to age prematurely; premature aging or senescence

to flourish for a long time without fading; ever-prosperous; enduring

rise and fall; prosperity and decline; the ups and downs of fortune or fate

to decline until final collapse or extinction; to die out; to wither away

to be in decline; to wane or become enfeebled; often used in literary contexts to describe the weakening of a nation or era

radioactive decay; process where an unstable atomic nucleus loses energy by radiation or changes into a more stable element

durable; never-ending; standing the test of time

a period of economic decline or recession

to experience a decline in physical or mental health before reaching old age; prematurely senile

not declining or weakening; enduring and persistent

dried-up or withered grass; dead vegetation typical of late autumn or winter

weak and failing; declining; in a state of decay

(literary) old and useless; senile and feeble

aged and failing in strength; losing one's energy due to old age

to decay and waste away; to decline and decrease

everything begins to fall once it has reached its highest point; prosperity is followed by decline

to wither; to shrivel; to decline and decay; to become weak and shrunken

old and feeble; aged; senile

prosperity and decline, glory and humiliation; used to describe the constant changes and ups and downs of life

(idiom) a woman loses her partner's affection as her physical beauty declines with age

to wither and fade; to become old and desolate; to become sparse (referring to hair)

weakening and close to exhaustion; in terminal decline. This idiom describes energy or morale that has steadily faded until it is completely spent, based on the classic military strategy of waiting for an enemy's spirit to flag after multiple charges.

A proverb meaning that once things reach the height of their prosperity or development, they will inevitably begin to decline; everything has its limits.

the ups and downs of life or history; the cycle of prosperity and decline

physically weak or frail, often due to old age or illness

the reduction in intensity of a light beam or signal as it travels through an optical fiber

to express pessimistic views about something; to talk down or disparage the prospects of something

the power and prosperity of a nation declining day by day declining

to gradually become weak or frail

clinical condition where the heart muscle is unable to pump enough blood to meet the body's needs

The process by which certain unstable elements spontaneously release radiation to transform into more stable elements; also called [[衰变|衰變|shuai1 bian4]] (shuāibiàn) or [[放射衰变|放射衰變|fang4 she4 shuai1 bian4]] (fàngshè shuāibiàn)

the process by which an unstable atomic nucleus loses energy by radiation

(literary) the most solemn of the five degrees of mourning dress in ancient China, made of the coarsest unhemmed hemp and worn for three years for a parent or husband

To go from a peak or period of success into a period of decay or failure or decline

When in a period of prosperity, do not forget that a time of decline or failure may come.

prosperity and decline; the rise and fall of fortunes over time

A psychological condition characterized by persistent mental fatigue, anxiety, and obsessive thoughts; sometimes used to refer to obsessive-compulsive disorder.