| 1 | 孤立 | 孤立 | gū lì | gu1 li4 | isolate; isolated | | |
| 2 | 孤独 | 孤獨 | gū dú | gu1 du2 | lonely; solitary | | |
| 3 | 孤 | 孤 | gū | gu1 | lone; lonely | | |
| 4 | 孤儿 | 孤兒 | gū ér | gu1 er2 | orphan | | |
| 5 | 孤证 | 孤證 | gū zhèng | gu1 zheng4 | sole evidence | | |
| 6 | 孤独于世 | 孤獨於世 | gū dú yú shì | gu1 du2 yu2 shi4 | alone in the world (idiom) | | |
| 7 | 孤寡 | 孤寡 | gū guǎ | gu1 gua3 | orphans and widows; to be lonely; loneliness | | |
| 8 | 孤孤零丁 | 孤孤零丁 | gū gu líng dīng | gu1 gu5 ling2 ding1 | lonely (idiom) | | |
| 9 | 孤高 | 孤高 | gū gāo | gu1 gao1 | arrogant | | |
| 10 | 孤芳自赏 | 孤芳自賞 | gū fāng zì shǎng | gu1 fang1 zi4 shang3 | lone flower admiring itself (idiom); narcissism; self-love | | |
| 11 | 孤儿院 | 孤兒院 | gū ér yuàn | gu1 er2 yuan4 | orphanage; child asylum | | |
| 12 | 孤儿药 | 孤兒藥 | gū ér yào | gu1 er2 yao4 | orphan drug | | |
| 13 | 孤儿寡母 | 孤兒寡母 | gū ér guǎ mǔ | gu1 er2 gua3 mu3 | orphans and widows (idiom) | | |
| 14 | 孤子 | 孤子 | gū zǐ | gu1 zi3 | orphan; fatherless son | | |
| 15 | 孤独症 | 孤獨症 | gū dú zhèng | gu1 du2 zheng4 | autism | | |
| 16 | 孤独无援 | 孤獨無援 | gū dú wú yuán | gu1 du2 wu2 yuan2 | lonely and isolated (idiom) | | |
| 17 | 孤独感 | 孤獨感 | gū dú gǎn | gu1 du2 gan3 | sense of loneliness | | |
| 18 | 孤吊伶仃 | 孤吊伶仃 | gū diào líng dīng | gu1 diao4 ling2 ding1 | aloneforsaken (idiom) | | |
| 19 | 孤岛 | 孤島 | gū dǎo | gu1 dao3 | isolated island | | |
| 20 | 孤胆英雄 | 孤膽英雄 | gū dǎn yīng xióng | gu1 dan3 ying1 xiong2 | solitary hero; maverick | | |
| 21 | 孤胆 | 孤膽 | gū dǎn | gu1 dan3 | solitary hero; maverick | | |
| 22 | 孤单 | 孤單 | gū dān | gu1 dan1 | lone; lonely; loneliness | | |
| 23 | 孤雌生殖 | 孤雌生殖 | gū cí shēng zhí | gu1 ci2 sheng1 zhi2 | parthenogenesis (biol. a female reproducing without fertilization) | | |
| 24 | 孤拔 | 孤拔 | gū bá | Gu1 ba2 | 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 | | |
| 25 | 孤傲 | 孤傲 | gū ào | gu1 ao4 | proud and aloof | | |