| 江南四大才子 | Jiāng nán sì dà cái zǐ | Four great southern talents of the Ming, namely: Tang Bohu 唐伯虎, Zhu Zhishan 祝枝山, Wen Zhengming 文征明 and Xu Zhenqing 徐祯卿 |
| 活力四射 | huó lì sì shè | dynamic; enthusiastic; energetic |
| 汉四郡 | Hàn sì jùn | four Han commanderies in north Korea 108 BC-c. 300 AD |
| 烽火四起 | fēng huǒ sì qǐ | the fire of war in all four directions (idiom); the confusion of war |
| 烽烟四起 | fēng yān sì qǐ | lit. fire beacons in all four directions (idiom); the confusion of war |
烽烟四起，
战火纷飞 | fēng yān sì qǐ ,
zhàn huǒ fēn fēi | lit. fire beacons in all four directions (idiom); the confusion of war |
| 狂三诈四 | kuáng sān zhà sì | to deceive and swindle across the board (idiom) |
| 狼烟四起 | láng yān sì qǐ | fire beacons on all sides (idiom); enveloped in the flames of war |
| 目空四海 | mù kōng sì hǎi | the eye can see nothing worthwhile all around (idiom); arrogant; condescending; supercilious |
| 破四旧 | pò sì jiù | Destroy the Four Olds (campaign of the Cultural Revolution) |
| 第四 | dì sì | fourth; number four |
| 第四季 | dì sì jì | fourth quarter |
| 第四季度 | dì sì jì dù | fourth quarter (of financial year) |
| 第四级 | dì sì jí | fourth level |
| 第四声 | dì sì shēng | fourth tone in Mandarin; falling tone |
| 第四台 | dì sì tái | fourth channel; (in Taiwan) cable TV, FTV |
| 股四头肌 | gǔ sì tóu jī | quadriceps muscle group; thigh muscles |
| 街坊四邻 | jiē fang sì lín | neighbors; the whole neighborhood |
| 调三窝四 | tiáo sān wō sì | to sow the seeds of discord everywhere (idiom) |
| 连三并四 | lián sān bìng sì | one after the other; in succession (idiom) |
| 周四 | zhōu sì | Thursday |
| 金砖四国 | jīn zhuān sì guó | Brazil, Russia, India and China (BRIC) |
| 杂剧四大家 | zá jù sì dà jiā | Four great Yuan dramatists, namely: Guan Hanqing 关汉卿, Zheng Guangzu 郑光祖, Ma Zhiyuan 马致远 and Bai Pu 白朴 |
| 头脑简单四肢发达 | tóu nǎo jiǎn dān sì zhī fā dá | all brawn no brains |
| 颠三倒四 | diān sān dǎo sì | confused; disorderly; incoherent |
| 飞沫四溅 | fēi mò sì jiàn | to spray in all directions |
| 魅力四射 | mèi lì sì shè | glamorous; charming; seductive |
| 丢三落四 | diū sān là sì | forgetful; scatterbrained |
