| 厶 | sī mǒu | private, secret; KangXi radical 28 |
| 巳 | sì | the hours from 9 to 11; 6th terrestrial branch |
| 纟 | sī | silk; KangXi radical 120 |
| 亖 | sì | four |
| 司 | sī | take charge of, control, manage; officer |
| 四 | sì | four |
| 丝 | sī | silk; fine thread; wire; strings |
| 㐌 | sì yí | a tribe of savages in South China |
| 汜 | sì | a stream which leaves the main branch then later returns |
| 䂖 | shí sì | (same as 石) rocks; stones; minerals, etc. |
| 寺 | sì | court, office; temple, monastery |
| 糹 | sī | silk; KangXi radical 120 |
| 糸 | mì sī | silk; KangXi radical 120 |
| 死 | sǐ | die; dead; death |
| 佀 | sì shì | resemble |
| 似 | sì shì | resemble, similar to; as if, seem |
| 伺 | sì cì | serve, wait upon, attend; examine |
| 私 | sī | private, personal; secret |
| 虒 | sī zhài yí | an amphibious beast resembling a tiger with one horn; place name |
| 泗 | sì | mucous; nasal flow; sniffle; river in Shandong |
| 䇃 | sì xiào | (same as 竢) (ancient form of 俟) to wait for, until; when; as soon as |
| 饲 | sì | raise animals; feed; nourish |
| 祀 | sì | to sacrifice, worship |
| 姒 | sì | wife of elder brother |
| 饴 | yí sì | sweet-meats; sweet-cakes; syrup |
| 驷 | sì | team of four horses; horses |
| 㕽 | sì | a phonetic |
| 㚶 | sì | (same as 姒)wife of one's husband's elder brother; (in ancient China) the elder of twins; a Chinese family name, (same as 姬) a handsome girl; a charming girl; a concubine; a Chinese family name |
| 兕 | sì | a female rhinoceros |
| 柶 | sì | ladle |
| 䃽 | fú gǔi sì | name of a mountain (of warship), (same as 禔) happiness; good fortune; good luck; blessing, (same as standard form 祓) to exorcise; to remove evil; to cleanse; to clean; to wash away |
| 䏤 | sì | (same as 顖 囟) top of the human head; the skull |
| 枱 | yí tái sì | a table, desk |
| 思 | sī sì sāi | think, consider, ponder; final particle |
| 㭒 | sì | (same as non-classical form 耜) a farming instrument; a spade; a shovel |
| 俟 | sì qí | wait for, wait until, as soon as |
| 食 | shí sì yì | eat; meal; food; KangXi radical number 184 |
| 鸶 | sī | the eastern egret |
| 祠 | cí sì | ancestral temple; offer sacrifice |
| 㾅 | sì zhì zǐ | defects; flaws, illness; disease |
| 涘 | sì | river bank; water's edge |
| 㸻 | sì | a kind of cattle, an one year old cattle |
| 苡 | yǐ sì | barley |
| 飤 | sì | to feed; provisions |
| 耜 | sì | spade-shaped tool; plow |
| 笥 | sì | a hamper, wicker basket |
| 䎣 | sì xìn | (same as 耜) a plough; a ploughshare |
| 偲 | sī | talented; urgent |
| 梩 | lí sì | a hod, a basket in which to carry earth |
| 絲 | sī | silk; fine thread; wire; strings |
| 覗 | sī sì | peek |
| 缌 | sī | coarse cotton cloth used for mourning |
| 赐 | sì cì | give, bestow favors; appoint |
| 蛳 | sī | kind of snail with spiral shell |
| 斯 | sī | this, thus, such; to lop off; emphatic particle |
| 媤 | sī | husband's family |
| 竢 | sì | wait for, wait until, as soon as |
| 飔 | sī | cool breeze of autumn |
| 肆 | sì tì | indulge; excess; numeral four; particle meaning now, therefore; shop |
| 肄 | yì sì | learn, practice, study; toil |
| 嗣 | sì | to connect, inherit; descendants, heirs |
| 雉 | zhì kǎi yǐ sì | pheasant; crenellated wall |
| 飴 | yí sì | sweet-meats; sweet-cakes; syrup |
| 锶 | sōng sī | strontium |
| 飼 | sì | raise animals; feed; nourish |
| 飼 | sì | raise animals; feed; nourish |
| 厮 | sī | servant; to make a disturbance |
| 䦙 | sì | (same as 寺 寺) a government agency, the court, a eunuch |
| 罳 | sī | wooden screen |
| 禠 | sī | happy |
| 㜦 | hàn nìe sì xíe xín | used in girl's name |
| 駟 | sì | team of four horses |
| 澌 | sī xī | to exhaust; to drain dry |
| 撕 | sī xī | rip, tear; buy cloth |
| 嘶 | sī xī | neighing of a horse; gravel voiced, husky throated; (Cant.) to hiccough |
| 廝 | sī | servant |
| 賜 | cì sì | give, bestow favors; appoint |
| 緦 | sī | coarse cotton cloth used for mourning |
| 噝 | sī | hiss; a call to come |
| 螄 | sī | kind of snail with spiral shell |
| 㣈 | sì | a kind of animal, a kind of rat, (interchangeable 肆) extremely; excessively; reckless; without restraint, to exhaust |
| 㹑 | sì yí | (same as large seal type form of 牭) a four years old cattle; a two and a half years old cattle |
| 儩 | sì | complete |
| 鍶 | sī sōng | strontium; an iron utensil |
| 颸 | sī | cool breeze of autumn |
| 蟖 | sī | the larva of a month; a grasshopper |
| 簛 | sī | sieve; to sift; to strain |
| 鷥 | sī | egret; Egretta garzetta |