Chinese Dictionary

Usage of the character 愁

to worry about

homesickness
nostalgia

destitute
troubled
penniless and full of care

sorrow; sadness
distressed; sorrowful

to relieve melancholy

melancholy

parting sorrow
pain of separation

to be worried

to worry
to fret
to be anxious
to become sad

melancholy

to worry
to be anxious

anxiety
worries

anxiety
distress

depressed
gloomy

xiāochóujiěmèn

lit. to eliminate worry and dispel melancholy (idiom); diversion from boredom
to dispel depression or melancholy
to relieve stress
a relaxing pass-time

chóuchángbǎijié

hundred knots of worry in one's intestines (idiom); weighed down with anxiety

lücǎnhóngchóu

(of women) grieved appearance (idiom)
sorrowful mien

duōchóushàngǎn

melancholy and moody (idiom); depressed personality

chóuméikǔliǎn

to look anxious (idiom)
to look miserable

miàndàichóuróng

with a sad air
looking melancholy
with a worried look

chóuméibùzhǎn

with a worried frown

xīnchóujiùhèn

new worries added to old hatred (idiom); afflicted by problems old and new

qióngchóuliáodǎo

impoverished and dejected; wretched and penniless

jièjiǔjiāochóu

to drown one's sorrows (in alcohol)

duōchóuduōbìng

much sorrows and illness (idiom); melancholy and weakly

jiùchóuxīnhèn

old worries with new hatred added (idiom); afflicted by problems old and new

huángdìnü'érbùchóujià

皇帝女儿不愁嫁

[皇帝女兒不愁嫁]

lit. the emperor's daughter does not worry about whether she will be able to marry (idiom)
fig. highly sought after

zěnyīgèchóuzìliǎodé

怎一个愁字了得

[怎一個愁字了得]

(last line of the poem 聲聲慢／声声慢 ( Shēngshēng Màn) by Song poet Li Qingzhao 李清照 ( Lǐ Qīngzhào))
how can it be expressed in one word, "sorrow"?
how can words express such sadness?

shīziduōlebùyǎng,zhàiduōlebùchóu

虱子多了不痒，债多了不愁

[虱子多了不癢，債多了不愁]

lit. covered with lice, one doesn't feel the itching anymore; up to one's ears in debt, one ceases to worry about it (idiom)
fig. to be past worrying (about sth)