| 四大 | sì dà | the four elements: earth, water, fire, and wind (Buddhism); the four freedoms: speaking out freely, airing views fully, holding great debates, and writing big-character posters, 大鳴大放|大鸣大放[da4 ming2 da4 fang4], 大辯論|大辩论[da4 bian4 lun4], 大字報|大字报[da4 zi4 bao4] (PRC) |
| 四川 | sì chuān | Sichuan province (Szechuan) in southwest China, abbr. 川 or 蜀, capital Chengdu 成都 |
| 四周 | sì zhōu | all around |
| 四月 | sì yuè | April; fourth month (of the lunar year) |
| 四方 | sì fāng | four-way; four-sided |
| 四处 | sì chù | all over the place; everywhere and all directions |
| 四肢 | sì zhī | the four limbs of the body |
| 四面 | sì miàn | all sides |
| 四人帮 | sì rén bāng | Gang of Four: Jiang Qing 江青[Jiang1 Qing1], Zhang Chunqiao 張春橋|张春桥[Zhang1 Chun1 qiao2], Yao Wenyuan 姚文元[Yao2 Wen2 yuan2], Wang Hongwen 王洪文[Wang2 Hong2 wen2], who served as scapegoats for the excesses of the cultural revolution |
| 四川省 | sì chuān shěng | Sichuan province (Szechuan) in southwest China, abbr. 川[Chuan1] or 蜀[Shu3], capital Chengdu 成都[Cheng2 du1] |
| 四季 | sì jì | four seasons, namely: spring 春[chun1], summer 夏[xia4], autumn 秋[qiu1] and winter 冬[dong1] |
| 四海 | sì hǎi | |
