| 面积 | miàn jī | surface area |
| 积极 | jī jí | active; energetic; vigorous; positive (outlook); proactive |
| 体积 | tǐ jī | volume; bulk; CL:个 |
| 积 | jī | to amass; to accumulate; to store; measured quantity (such as area of volume); product (the result of multiplication); to integrate (math.); to solve (or integrate) an ordinary differential equation (math.); old; long-standing |
| 积累 | jī lěi | to accumulate; accumulation; cumulative; cumulatively |
| 积极性 | jī jí xìng | zeal; initiative; enthusiasm; activity |
| 容积 | róng jī | volume; physical space taken up by an object |
| 乘积 | chéng jī | product (result of multiplication) |
| 堆积 | duī jī | to pile up; to heap; accumulation |
| 蓄积 | xù jī | to store up; to save up |
| 材积 | cái jī | volume (of timber) |
| 积极分子 | jī jí fèn zǐ | enthusiast; zealot |
| 沉积 | chén jī | sediment; deposit; sedimentation (geology) |
| 积肥 | jī féi | to accumulate manure; to lay down compost |
| 积压 | jī yā | to overstock; backlog; accumulation of neglected work; arrears of work |
| 积聚 | jī jù | to coalesce; to gather together; to amass |
| 耕地面积 | gēng dì miàn jī | area of arable land |
| 积分 | jī fēn | integral (calculus); accumulated points (in sports, at school etc); total credits earned by student; bonus points in a benefit scheme |
| 积雪 | jī xuě | accumulation of snow |
| 累积 | lěi jī | to accumulate |
| 积蓄 | jī xù | to save; to put aside; savings |
| 沉积物 | chén jī wù | sediment |
| 冲积 | chōng jī | alluvial |
| 积存 | jī cún | to stockpile |
| 积雨云 | jī yǔ yún | cumulonimbus (cloud) |
| 微积分 | wēi jī fēn | calculus; differentiation and integration; calculus of infinitesimals 微 and integrals 积 |
| 积习 | jī xí | old habit (usually bad); inbred custom; deep-rooted practice |
| 囤积 | tún jī | to stock up; to lay in supplies; to hoard (for speculation); to corner the market in sth |
| 聚积 | jù jī | to accumulate; to collect; to build up |
| 积冰 | jī bīng | ice accretion |
| 积弊 | jī bì | age-old (malpractice); long established (corrupt practices); deeply rooted (superstition) |
| 积木 | jī mù | toy building blocks |
| 处心积虑 | chǔ xīn jī lǜ | to think through sth deliberately and methodically (idiom); to rack one's brains |
| 冲积平原 | chōng jī píng yuán | alluvial plain |
| 积案 | jī àn | long pending case |
| 积云 | jī yún | cumulus; heap cloud |
| 不定积分 | bù dìng jī fēn | indefinite integral (math.) |
| 内积 | nèi jī | inner product; the dot product of two vectors |
| 公积金 | gōng jī jīn | official reserves; accumulated fund |
| 六方最密堆积 | liù fāng zuì mì duī jī | hexagonal close-packed (HCP) (math) |
| 冰积物 | bīng jī wù | glacial sediment |
| 叉积 | chā jī | cross product |
| 吸积 | xī jī | accretion |
| 囤积居奇 | tún jī jū qí | to hoard and profiteer; to speculate |
| 地积单 | dì jī dān | unit of area (eg 亩, Chinese acre) |
| 堆金积玉 | duī jīn jī yù | lit. pile up gold and jade; very rich |
| 外积 | wài jī | exterior product; the cross product of two vectors |
| 容积效率 | róng jī xiào lǜ | volumetric efficiency (engine technology) |
| 层积云 | céng jī yún | stratocumulus cloud |
| 微积分基本定理 | wēi jī fēn jī běn dìng lǐ | fundamental theorem of calculus |
