| 孤儿 | [ gū ér ] orphan |
| 孤儿药 | [ gū ér yaò ] orphan drug |
| 孤儿院 | [ gū ér yuàn ] orphanage, child asylum |
| 孤单 | [ gū dān ] lone, lonely, loneliness |
| 孤岛 | [ gū daǒ ] isolated island |
| 孤掌难鸣 | [ 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. |
| 孤沙锥 | [ gū shā zhuī ] (bird species of China) solitary snipe (Gallinago solitaria) |
| 孤注一掷 | [ gū zhù yī zhì ] to stake all on one throw |
| 孤独 | [ gū dú ] lonely, solitary |
| 孤独于世 | [ gū dú yú shì ] alone in the world (idiom) |
| 孤独症 | [ gū dú zhèng ] autism |
| 孤立无援 | [ gū lì wú yuán ] isolated and without help |
| 孤绝 | [ gū jué ] isolated, solitary |
| 孤胆 | [ gū dǎn ] solitary hero, maverick |
| 孤胆英雄 | [ gū dǎn yīng xióng ] solitary hero, maverick |
| 孤芳自赏 | [ gū fāng zì shǎng ] lone flower admiring itself (idiom); narcissism, self-love |
| 孤证 | [ gū zhèng ] sole evidence |
| 孤证不立 | [ gū zhèng bù lì ] unacceptable as uncorroborated evidence (in law or in textual criticism) |
| 孤负 | [ gū fù ] variant of 辜負|辜负[gu1 fu4] |
| 孤身只影 | [ gū shēn zhī yǐng ] lit. a lonely body with only a shadow for company, to be all alone (idiom) |
| 孤军奋战 | [ 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 |
| 孤陋寡闻 | [ gū loù guǎ wén ] ignorant and inexperienced, ill-informed and narrow-minded |
| 孤鸟 | [ gū ] lone bird, marginalized (country, person etc) |
| 孤鸾年 | [ gū luán nián ] inauspicious year for marriage |
| ⇒ 孑影孤单 | [ jié yǐng gū dān ] to be all alone by oneself |
| ⇒ 独孤求败 | [ dú gū qiú baì ] Dugu Qiubai, a fictional character appearing in 金庸[Jin1 Yong1] novels |
| ⇒ 生态孤岛 | [ shēng taì gū daǒ ] insularization (as a threat to biodiversity) |
| ⇒ 脚孤拐 | [ gū ] bunion, hallux valgus |
| ⇒ 苦心孤诣 | [ kǔ xīn gū yì ] to make painstaking efforts (idiom); after much trouble, to work hard at sth |
| ⇒ 遗孤 | [ yí gū ] orphan |
| ⇒ 鳏寡孤独 | [ guān guǎ gū dú ] lit. widowers, widows, orphans and the childless, fig. people with no one left to rely on |
