Usage of the character 孤

Amédée Courbet (1826-1885), a French admiral who won a series of important land and naval victories during the Tonkin campaign and the Sino-French War

gūguǎi

孤拐

[孤拐]

cheekbone
ankle

gūjué

孤绝

[孤絕]

isolated; solitary

gūgāo

孤高

[孤高]

arrogant

gūniǎo

孤鸟

[孤鳥]

lone bird
marginalized (country, person etc)

gūlì

孤立

[孤立]

to isolate
isolated
unrelated; irrelevant

yígū

遗孤

[遺孤]

orphan

gūdú

孤独

[孤獨]

lonely
solitary

gūshuāng

孤孀

[孤孀]

widow

gūjié

孤孑

[孤孑]

lonesome; solitary

gūshēn

孤身

[孤身]

alone
lonely

gūzhēng

孤征

[孤征]

to act on one's own
to fight alone

gūpì

孤僻

[孤僻]

antisocial
reclusive
eccentric

gūzhèng

孤证

[孤證]

sole evidence

miǎogū

藐孤

[藐孤]

small orphan

gū'éryào

孤儿药

[孤兒藥]

orphan drug

gūlínglíng

孤零零

[孤零零]

lone
isolated and without help
all alone
solitary

gūlìzǐ

孤立子

[孤立子]

soliton (physics)

gūshāzhuī

孤沙锥

[孤沙錐]

(bird species of China) solitary snipe (Gallinago solitaria)

gū'éryuàn

孤儿院

[孤兒院]

orphanage
child asylum

gūdúzhèng

孤独症

[孤獨症]

autism

jiǎogūguai

脚孤拐

[腳孤拐]

bunion
hallux valgus

gūluánnián

孤鸾年

[孤鸞年]

inauspicious year for marriage

gū'āizǐ

孤哀子

[孤哀子]

(literary) orphan

gūhúnyěguǐ

孤魂野鬼

[孤魂野鬼]

wandering ghosts without living descendants to pray for them (idiom)
person who has no family or friends to rely on

shēngtàigūdǎo

生态孤岛

[生態孤島]

insularization (as a threat to biodiversity)

gūlìzǐbō

孤立子波

[孤立子波]

instanton (math.)

gūlòuguǎwén

孤陋寡闻

[孤陋寡聞]

ignorant and inexperienced
ill-informed and narrow-minded

gūdúyúshì

孤独于世

[孤獨於世]

alone in the world (idiom)

gūjiétèlì

孤孑特立

[孤孑特立]

to be all alone in the world

gūnánguǎnü

孤男寡女

[孤男寡女]

a single man and a single woman
bachelors
a man and a woman together (typically in a secluded setting)

gūdǎnyīngxióng

孤胆英雄

[孤膽英雄]

solitary hero
maverick

gūshēnzhīyǐng

孤身只影

[孤身隻影]

lit. a lonely body with only a shadow for company
to be all alone (idiom)

yīyìgūxíng

一意孤行

[一意孤行]

obstinately clinging to one's course (idiom)
willful
one's own way
dogmatic

gūjūnfènzhàn

孤军奋战

[孤軍奮戰]

lit. lone army putting up a brave fight (idiom)
fig. (of a person or group of people) struggling hard without support

jiéyǐnggūdān

孑影孤单

[孑影孤單]

to be all alone by oneself

gūzhùyīzhì

孤注一掷

[孤注一擲]

to stake all on one throw

tiānshàgūxīng

天煞孤星

[天煞孤星]

bane of others' existence

gūfāngzìshǎng

孤芳自赏

[孤芳自賞]

lone flower admiring itself (idiom); narcissism
self-love

Dúgū Qiúbài

独孤求败

[獨孤求敗]

Dugu Qiubai, a fictional character appearing in 金庸 ( Jīn Yōng) novels

kǔxīngūyì

苦心孤诣

[苦心孤詣]

to make painstaking efforts (idiom); after much trouble
to work hard at sth

gūcíshēngzhí

孤雌生殖

[孤雌生殖]

parthenogenesis (biol. a female reproducing without fertilization)

guānguǎgūdú

鳏寡孤独

[鰥寡孤獨]

lit. widowers, widows, orphans and the childless
fig. people with no one left to rely on

gūkǔlíngdīng

孤苦零丁

[孤苦零丁]

variant of 孤苦伶仃 (gūkǔlíngdīng)

gūjiāguǎrén

孤家寡人

[孤家寡人]

one who is cut off from others (idiom)
one who has chosen to follow a solitary path
(can also be an indirect way of referring to an unmarried person)

gūzhǎngnánmíng

孤掌难鸣

[孤掌難鳴]

It's hard to clap with only one hand.
It takes two to tango
It's difficult to achieve anything without support.

gūzhèngbùlì

孤证不立

[孤證不立]

unacceptable as uncorroborated evidence (in law or in textual criticism)

gūlìwúyuán

孤立无援

[孤立無援]

isolated and without help

gūkǔlíngdīng

孤苦伶仃

[孤苦伶仃]

solitary and impoverished (idiom)