| 尸 | si | corpse; to impersonate the dead; to preside; KangXi radical 44 |
| 矢 | si | arrow, dart; vow, swear |
| 市 | si | market, fair; city, town; trade |
| 示 | si ki | show, manifest; demonstrate |
| 乨 | si | the beginning; to start, to begin, to be the first |
| 寺 | sa si | court, office; temple, monastery |
| 豕 | si | a pig, boar; KangXi radical 152 |
| 始 | si | begin, start; then, only then |
| 使 | sa si | cause, send on a mission, order; envoy, messenger, ambassador |
| 侍 | si | serve, attend upon; attendant, servant; samurai |
| 兕 | si | a female rhinoceros |
| 柹 | si | persimmon |
| 施 | si i | grant, bestow; give; act; name |
| 是 | si | indeed, yes, right; to be; demonstrative pronoun, this, that |
| 昰 | ha si | var of 'to be', 'summer'; name |
| 枲 | si | male nettle-hemp |
| 枾 | si | persimmon |
| 柿 | si | persimmon |
| 柴 | si chay | firewood, faggots, fuel |
| 恃 | si | rely on, presume on, trust to |
| 屎 | si | excrement, dung |
| 屍 | si | corpse, carcass |
| 翅 | si | wings; fin |
| 豺 | si | wolf; cruel, wicked, mean |
| 時 | si | time, season; era, age, period |
| 偲 | si | talented; urgent |
| 匙 | si | spoon; surname |
| 猜 | si | guess, conjecture, suppose; feel |
| 豉 | si | fermented beans |
| 視 | si | look at, inspect, observe, see |
| 啻 | si | only, merely; just like; stop at |
| 媤 | si | husband's family |
| 提 | cey si | hold in hand; lift in hand |
| 弑 | si | to kill one's superior |
| 茬 | si | harvest |
| 詩 | si | poetry; poem, verse, ode |
| 試 | si | test, try, experiment |
| 弒 | si | to kill one's superior |
| 塒 | si | roost |
| 飴 | i si | sweet-meats; sweet-cakes; syrup |
| 禔 | cey si | happiness; peace; good fortune |
| 厮 | si | servant; to make a disturbance |
| 廝 | si | servant |
| 緦 | si | coarse cotton cloth used for mourning |
| 嘶 | si | neighing of a horse; gravel voiced, husky throated; (Cant.) to hiccough |
| 澌 | si | to exhaust; to drain dry |
| 諟 | si | to examine; to consider; honest |
| 諡 | si | posthumous name, posthumous title |
| 蓍 | si | milfoil, plant used in divination |
| 蒔 | si | transplant; plant; dill, Anethum graveolens |
| 鍉 | si | spoon, key |
| 顋 | si | lower part of face; jaw; gills of a fish |
| 鰣 | si | reeves' shad; hilsa herring |
| 釃 | si | strain |