| 孤 | [ gū ] lone, lonely |
| 孤傲 | [ gū aò ] proud and aloof |
| 孤僻 | [ gū pì ] antisocial, reclusive, eccentric |
| 孤兒 | [ gū ér ] orphan |
| 孤兒藥 | [ gū ér yaò ] orphan drug |
| 孤兒院 | [ gū ér yuàn ] orphanage, child asylum |
| 孤哀子 | [ gū aī zǐ ] (literary) orphan |
| 孤單 | [ gū dān ] lone, lonely, loneliness |
| 孤孀 | [ gū shuāng ] widow |
| 孤子 | [ gū zǐ ] orphan, fatherless son |
| 孤孑 | [ gū jié ] lonesome, solitary |
| 孤孑特立 | [ gū jié tè lì ] to be all alone in the world |
| 孤家寡人 | [ gū jiā guǎ rén ] 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) |
| 孤寂 | [ gū jì ] lonesome, desolate |
| 孤寒 | [ gū hán ] alone and poor, humble, (Cantonese) miserly |
| 孤寡 | [ gū guǎ ] orphans and widows, to be lonely, loneliness |
| 孤山 | [ gū shān ] Solitary Hill, located in West Lake, Hangzhou, Zhejiang Province |
| 孤山 | [ gū shān ] isolated peak |
| 孤島 | [ gū daǒ ] isolated island |
| 孤征 | [ gū zhēng ] to act on one's own, to fight alone |
| 孤拐 | [ gū ] cheekbone, ankle |
| 孤拔 | [ gū bá ] 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 |
| 孤掌難鳴 | [ gū zhǎng nán míng ] It's hard to clap with only one hand., It takes two to tango, It's difficult to achieve anything without support. |
| 孤沙錐 | [ gū shā zhuī ] (bird species of China) solitary snipe (Gallinago solitaria) |
| 孤注一擲 | [ gū zhù yī zhì ] to stake all on one throw |
| 孤獨 | [ gū dú ] lonely, solitary |
| 孤獨於世 | [ gū dú yú shì ] alone in the world (idiom) |
| 孤獨症 | [ gū dú zhèng ] autism |
| 孤男寡女 | [ gū nán guǎ nǚ ] a single man and a single woman, bachelors, a man and a woman together (typically in a secluded setting) |
| 孤立 | [ gū lì ] isolate, isolated |
| 孤立子 | [ gū lì zǐ ] soliton (physics) |
| 孤立子波 | [ gū lì zǐ bō ] instanton (math.) |
| 孤立無援 | [ gū lì wú yuán ] isolated and without help |
| 孤絕 | [ gū jué ] isolated, solitary |
| 孤老 | [ gū laǒ ] solitary old man or woman, regular patron (at brothels) |
| 孤膽 | [ gū dǎn ] solitary hero, maverick |
| 孤膽英雄 | [ gū dǎn yīng xióng ] solitary hero, maverick |
| 孤芳自賞 | [ gū fāng zì shǎng ] lone flower admiring itself (idiom); narcissism, self-love |
| 孤苦伶仃 | [ gū kǔ líng dīng ] solitary and impoverished (idiom) |
| 孤苦零丁 | [ gū kǔ líng dīng ] variant of 孤苦伶仃[gu1 ku3 ling2 ding1] |
| 孤證 | [ gū zhèng ] sole evidence |
| 孤證不立 | [ gū zhèng bù lì ] unacceptable as uncorroborated evidence (in law or in textual criticism) |
| 孤負 | [ gū fù ] variant of 辜負|辜负[gu1 fu4] |
| 孤身 | [ gū shēn ] alone, lonely |
| 孤身隻影 | [ gū shēn zhī yǐng ] lit. a lonely body with only a shadow for company, to be all alone (idiom) |
| 孤軍奮戰 | [ gū jūn fèn zhàn ] lit. lone army putting up a brave fight (idiom), fig. (of a person or group of people) struggling hard without support |
| 孤陋 | [ gū loù ] ignorant, ill-informed |
| 孤陋寡聞 | [ gū loù guǎ wén ] ignorant and inexperienced, ill-informed and narrow-minded |
| 孤雌生殖 | [ gū cí shēng zhí ] parthenogenesis (biol. a female reproducing without fertilization) |
| 孤零零 | [ gū líng líng ] lone, isolated and without help, all alone, solitary |
| 孤高 | [ gū gaō ] arrogant |
| 孤魂 | [ gū hún ] lonely soul |
| 孤魂野鬼 | [ gū hún yě guǐ ] wandering ghosts without living descendants to pray for them (idiom), person who has no family or friends to rely on |
| 孤鳥 | [ gū ] lone bird, marginalized (country, person etc) |
| 孤鸞年 | [ gū luán nián ] inauspicious year for marriage |
| ⇒ 一意孤行 | [ yī yì gū xíng ] obstinately clinging to one's course (idiom), willful, one's own way, dogmatic |
| ⇒ 天煞孤星 | [ tiān shà gū xīng ] bane of others' existence |
| ⇒ 孑影孤單 | [ jié yǐng gū dān ] to be all alone by oneself |
| ⇒ 獨孤求敗 | [ dú gū qiú baì ] Dugu Qiubai, a fictional character appearing in 金庸[Jin1 Yong1] novels |
| ⇒ 生態孤島 | [ shēng taì gū daǒ ] insularization (as a threat to biodiversity) |
| ⇒ 肚孤 | [ dù gū ] (Tw) to doze off (from Taiwanese 盹龜, Tai-lo pr. [tuh-ku]) |
| ⇒ 腳孤拐 | [ gū ] bunion, hallux valgus |
| ⇒ 苦心孤詣 | [ kǔ xīn gū yì ] to make painstaking efforts (idiom); after much trouble, to work hard at sth |
| ⇒ 藐孤 | [ gū ] small orphan |
| ⇒ 遺孤 | [ yí gū ] orphan |
| ⇒ 鰥寡孤獨 | [ guān guǎ gū dú ] lit. widowers, widows, orphans and the childless, fig. people with no one left to rely on |
