| 基础 | jī chǔ | base; foundation; basis; underlying; CL:个 |
| 基本 | jī běn | basic; fundamental; main; elementary |
| 基 | jī | base; foundation; basic; radical (chemistry) |
| 基本上 | jī běn shang | basically; on the whole |
| 基层 | jī céng | basic level; grass-roots unit; basement layer |
| 基地 | jī dì | base (of operations); industrial or military base; al-Qaeda |
| 基金 | jī jīn | fund |
| 基极 | jī jí | base electrode (in transistor) |
| 基因 | jī yīn | gene (loanword) |
| 基建 | jī jiàn | capital construction (project); infrastructure |
| 基督教 | jī dū jiào | Christianity; Christian |
| 基准 | jī zhǔn | norm; standard; standard of reference; base; base point; base line; benchmark; reference point; reference frame; criterion; data |
| 基团 | jī tuán | radical (chemistry) |
| 基本功 | jī běn gōng | basic skills; fundamentals |
| 基督 | Jī dū | Christ |
| 基本原则 | jī běn yuán zé | fundamental doctrine; guiding principle; raison d'être |
| 基点 | jī diǎn | main point; crux; central point |
| 基本粒子 | jī běn lì zǐ | elementary particle |
| 基音 | jī yīn | fundamental tone |
| 基石 | jī shí | cornerstone |
| 基因型 | jī yīn xíng | genotype |
| 基辅 | Jī fǔ | Kiev, capital of Ukraine |
| 基线 | jī xiàn | base (of a triangle); base line (in geodetic survey); horizontal |
| 基岩 | jī yán | base rock; bedrock |
| 基底 | jī dǐ | plinth; base; substrate |
| 基础课 | jī chǔ kè | basic course; core curriculum |
| 基尔 | Jī ěr | Kiel (German city) |
| 基质 | jī zhì | base solvent (of chemical compound); stroma (framing biological tissue) |
| 基调 | jī diào | main key (of a musical composition); keynote (speech) |
| 基辛格 | Jī xīn gé | Henry Kissinger (1923-), US academic and politician, Secretary of State 1973-1977 |
| 基坑 | jī kēng | foundation groove; trench for building foundation |
| 基加利 | Jī jiā lì | Kigali, capital of Rwanda |
| 基因修改 | jī yīn xiū gǎi | genetic modification |
| 基因图谱 | jī yīn tú pǔ | mapping of genome |
| 基因学 | jī yīn xué | genetics |
| 基因工程 | jī yīn gōng chéng | genetic engineering |
| 基因库 | jī yīn kù | gene bank |
| 基因技术 | jī yīn jì shù | genetic technology; biotechnology |
| 基因扩大 | jī yīn kuò dà | gene amplification |
| 基因改造 | jī yīn gǎi zào | genetic modification (GM) |
| 基因染色体异常 | jī yīn rǎn sè tǐ yì cháng | genetic chromosome abnormality |
| 基因治疗 | jī yīn zhì liáo | gene therapy |
| 基因码 | jī yīn mǎ | genetic code |
| 基因突变 | jī yīn tū biàn | genetic mutation |
| 基因组 | jī yīn zǔ | genome |
| 基因表达 | jī yīn biǎo dá | gene expression |
| 基因变异 | jī yīn biàn yì | genetic variation |
| 基地恐怖组织 | Jī dì kǒng bù zǔ zhī | Al Qaeda; same as 基地组织 |
| 基地组织 | jī dì zǔ zhī | Al Qaeda |
| 基址 | jī zhǐ | foundation; footing; base; ruins (of a historical building) |
