| 四十多 | sì shí duō | more than 40 |
| 四合院 | sì hé yuàn | courtyard house (type of Chinese residence) |
| 四国犬 | sì guó quǎn | Shikoku (dog) |
| 四境 | sì jìng | all the borders |
| 四大佛教名山 | Sì dà Fó jiào Míng shān | Four Sacred Mountains of Buddhism, namely: Mt Wutai 五台山 in Shanxi, Mt Emei 峨眉山 in Sichuan, Mt Jiuhua 九华山 in Anhui, Mt Potala 普陀山 in Zhejiang |
| 四大名著 | sì dà míng zhù | the Four Classic Novels of Chinese literature, namely: A Dream of Red Mansions 红楼梦, Romance of Three Kingdoms 三国演义, Water Margin 水浒传, Journey to the West 西游记 |
| 四大天王 | sì dà tiān wáng | the four heavenly kings (Sanskrit vajra); the four guardians or warrior attendants of Buddha |
| 四大发明 | sì dà fā míng | the four great Chinese inventions: paper, printing, magnetic compass and gunpowder |
| 四大皆空 | sì dà jiē kōng | lit. the four elements are vanity (idiom); this world is an illusion |
| 四大盆地 | sì dà pén dì | four great basin depressions of China, namely: Tarim 塔里木盆地 in south Xinjiang, Jungar 准葛尔盆地 and Tsaidam or Qaidam 柴达木盆地 in north Xinjiang Sichuan 四川盆地 |
| 四大石窟 | sì dà shí kū | Four great caves, namely: Longmen grottoes 龙门石窟 at Luoyang, Henan, Yungang caves 云冈石窟 at Datong, Shanxi, Mogao caves 莫高窟 at Dunhuang, Gansu, and Mt Maiji caves 麦积山石窟 at Tianshui, Gansu |
| 四大美女 | sì dà měi nǚ | Four legendary beauties of ancient China, namely: Xi Shi 西施, Wang Zhaojun 王昭君, Diaochan 貂蝉 and Yang Yuhuan 杨玉环 or Yang Guifei 杨贵妃 |
| 四大须生 | sì dà xū shēng | Four great beards of Beijing opera, namely: Ma Lianliang 马连良, Tan Fuying 谭富英, Yang Baosen 杨宝森, Xi Xiaobo 奚啸伯 |
| 四天 | sì tiān | four days |
| 四子王 | Sì zǐ wáng | Siziwang banner or Dörvön-xüüxed khoshuu in Ulaanchab 乌兰察布, Inner Mongolia |
| 四子王旗 | Sì zǐ wáng qí | Siziwang banner or Dörvön-xüüxed khoshuu in Ulaanchab 乌兰察布, Inner Mongolia |
| 四季如春 | sì jì rú chūn | four seasons like spring; favorable climate throughout the year |
| 四季豆 | sì jì dòu | green bean; French bean; runner bean |
| 四季豆腐 | sì jì dòu fu | four seasons beancurd |
| 四小龙 | Sì Xiǎo lóng | Four Asian Tigers; East Asian Tigers; Four Little Dragons (East Asian economic powers: Taiwan, South Korea, Singapore and Hong Kong) |
| 四川大地震 | Sì chuān dà dì zhèn | Sichuan great earthquake; the magnitude 8 earthquake of May 2008 at Wenchuan 汶川, Sichuan, that killed more than 80,000 people |
| 四川大学 | Sì chuān Dà xué | Sichuan University |
| 四川日报 | Sì chuān rì bào | Sichuan Daily |
| 四平八稳 | sì píng bā wěn | everything steady and stable (idiom); overcautious and unimaginary |
| 四平地区 | Sì píng dì qū | former Siping prefecture, Jilin |
| 四平市 | Sì píng shì | Siping prefecture level city in Jilin province 吉林省 in northeast China |
| 四年制的大学 | sì nián zhì de dà xué | four-year university |
| 四年前 | sì nián qián | four years previously |
| 四库 | sì kù | the four book depositories, namely: classics 经, history 史, philosophy 子, belle-lettres 集 |
| 四库全书 | sì kù quán shū | Siku Quanshu (collection of books compiled during Qing dynasty) |
| 四强 | sì qiáng | semifinals |
| 四德 | sì dé | four Confucian injunctions 孝悌忠信 (for men), namely: piety 孝 to one's parents, respect 悌 to one's older brother, loyalty 忠 to one's monarch, faith 信 to one's male friends; the four Confucian virtues for women of morality 德, physical charm 容, propriety in speech 言 and efficiency in needlework 功 |
| 四方区 | Sì fāng qū | Sifang district of Qingdao city 青岛市, Shandong |
| 四方步 | sì fāng bù | a slow march |
| 四方脸 | sì fāng liǎn | square-jawed face |
| 四方台 | Sì fāng tái | Sifangtai district of Shuangyashan city 双鸭山, Heilongjiang |
| 四方台区 | Sì fāng tái qū | Sifangtai district of Shuangyashan city 双鸭山, Heilongjiang |
| 四方响应 | sì fāng xiǎng yìng | a response from every direction (idiom) |
| 四日市 | Sì rì shì | Yokaichi City in Mi'e prefecture 三重县, Japan |
| 四日市市 | Sì rì shì shì | Yokkaichi, Mie prefecture 三重县, Japan |
| 四旬节 | sì xún jié | First Sunday of Lent |
| 四旬斋 | sì xún zhāi | Lent (Christian period of forty days before Easter) |
| 四更 | sì gēng | fourth of the five night watch periods 01:00-03:00 (old) |
| 四会 | Sì huì | Sihui county level city in Zhaoqing 肇庆, Guangdong |
| 四会市 | Sì huì shì | Sihui county level city in Zhaoqing 肇庆, Guangdong |
| 四月 | sì yuè | April; fourth month (of the lunar year) |
| 四月份 | sì yuè fèn | April |
| 四次 | sì cì | fourth; four times; quartic |
| 四氟化硅 | sì fú huà guī | silicon tetrafluoride SiF4 |
| 四氟化铀 | sì fú huà yóu | uranium tetrafluoride (UF4) |
