| 积极性 | jī jí xìng | zeal / initiative / enthusiasm / activity |   |
| 二极管 | èr jí guǎn | diode | |
| 太极拳 | tài jí quán | shadowboxing or Taiji, T'aichi or T'aichichuan / traditional form of physical exercise or relaxation / a martial art | |
| 北极星 | Běi jí xīng | North Star / Polaris | |
| 三极管 | sān jí guǎn | triode (vacuum tube or transistor) | |
| 北极熊 | běi jí xióng | polar bear | |
| 棒极了 | bàng jí le | super / excellent | |
| 多极化 | duō jí huà | multipolar / multipolarization | |
| 南极洲 | Nán jí zhōu | Antarctica | |
| 太极图 | Tài jí tú | diagram of cosmological scheme / Yin-Yang symbol ☯ | |
| 北极圈 | Běi jí quān | Arctic Circle | |
| 两极化 | liǎng jí huà | to polarize / polarization / polarized / divergent | |
| 太极剑 | tài jí jiàn | a kind of traditional Chinese sword-play | |
| 南北极 | nán běi jí | south and north poles | |
| 八极拳 | bā jí quán | Ba Ji Quan "Eight Extremes Fist" - Martial Art | |
| 北极狐 | běi jí hú | arctic fox | |
| 北极光 | běi jí guāng | northern lights / aurora borealis | |
| 北极龙 | běi jí lóng | Arctosaurus | |
| 北极霾 | běi jí mái | Arctic haze | |
| 北极鸥 | běi jí ōu | (bird species of China) glaucous gull (Larus hyperboreus) | |
| 北极区 | běi jí qū | northern polar zone | |
| 北极虾 | běi jí xiā | Northern prawn | |
| 北极鳐 | běi jí yáo | Arctic skate | |
| 不偏极 | bù piān jí | unpolarized (light) | |
| 打太极 | dǎ tài jí | to practice tai chi / (fig.) to avoid responsibility / to pass the buck | |
| 地理极 | dì lǐ jí | geographic pole / north and south poles | |
| 皇太极 | Huáng Tài jí | Hong Taiji (1592-1643), eighth son of Nurhaci 努爾哈赤|努尔哈赤[Nu3 er3 ha1 chi4], reigned 1626-1636 as Second Khan of Later Jin dynasty 後金|后金[Hou4 Jin1], then founded the Qing dynasty 大清[Da4 Qing1] and reigned 1636-1643 as Emperor / posthumous name 清太宗[Qing1 Tai4 zong1] | |
| 两极症 | liǎng jí zhèng | bipolar disorder | |
| 南极光 | nán jí guāng | southern lights / aurora australis | |
| 南极海 | Nán jí Hǎi | Southern Ocean | |
| 南极界 | nán jí jiè | Antarctic realm | |
| 南极圈 | nán jí juàn | Antarctic Circle | |
| 南极洋 | nán jí yáng | Southern Ocean | |
| 南极座 | Nán jí zuò | Octans (constellation) | |
| 偏极化 | piān jí huà | polarization / polarized | |
| 偏极镜 | piān jí jìng | polarizing lens / polarizer | |
| 无极县 | Wú jí xiàn | Wuji county in Shijiazhuang 石家莊|石家庄[Shi2 jia1 zhuang1], Hebei | |
| 消极性 | xiāo jí xìng | passive / passivity / negative / negativity | |
| 旋转极 | xuán zhuǎn jí | pole of rotation | |
| 阳电极 | yáng diàn jí | anode / positive electrode (i.e. attracting electrons) | |
| 增长极 | zēng zhǎng jí | growth pole | |
| 积极分子 | jī jí fèn zǐ | enthusiast / (political) activist | |
| 积极进取 | jī jí jìn qǔ | proactive | |
| 登峰造极 | dēng fēng zào jí | to reach great heights (in technical skills or scholastic achievements) | |
| 穷凶极恶 | qióng xiōng jí è | fiendish / black-hearted | |
| 罪大恶极 | zuì dà è jí | guilty of terrible crimes (idiom) / reprehensible | |
| 盛极一时 | shèng jí yī shí | all the rage for a time / grand fashion for a limited time | |
| 否极泰来 | pǐ jí tài lái | extreme sorrow turns to joy (idiom) | |
| 殚精极虑 | dān jīng jí lu:4 | to exhaust one's thoughts and ingenuity (idiom) / to think sth through thoroughly / to rack one's brains / to leave no stone unturned | |
| 乐极生悲 | lè jí shēng bēi | extreme joy turns to sorrow (idiom) / Don't celebrate too soon, things could still go wrong! | |
| 穷奢极侈 | qióng shē jí chǐ | extravagant in the extreme (idiom) | |
| 穷奢极欲 | qióng shē jí yù | to indulge in a life of luxury (idiom) / extreme extravagance | |
| 位极人臣 | wèi jí rén chén | to have reached the highest official positions | |
| 物极必反 | wù jí bì fǎn | when things reach an extreme, they can only move in the opposite direction (idiom) | |
| 监测极限 | | detection limit | |
| 终极选择 | | option of last resort | |
| 感生极化 | | induced polarization | |
| 感应极化 | | induced polarization | |
| 积极威慑 | | active deterrence | |
| 爆炸极限 | bào zhà jí xiàn | explosive | |
| 磁单极子 | cí dān jí zǐ | magnetic monopole | |
| 放牧极限 | fàng mù jí xiàn | grazing capacity | |
| 光二极管 | guāng èr jí guǎn | photodiode / light-emitting diode (LED) | |
| 红极一时 | hóng jí yī shí | tremendously popular for a while | |
| 环极涡旋 | huán jí wō xuán | circumpolar vortex | |
| 积极防御 | jī jí fáng yù | active defence | |
| 积极反应 | jī jí fǎn yìng | active response / energetic response | |
| 乐不可极 | lè bù kě jí | (idiom) one should not overindulge in pleasure | |
| 两极分化 | liǎng jí fēn huà | polarization | |
| 南极冰盖 | nán jí bīng gài | Antarctic Ice Sheet | |
| 南极磷虾 | nán jí lín xiā | Antarctic | |
| 南极条约 | nán jí tiáo yuē | Antarctic Treaty | |
| 南极项目 | nán jí xiàng mù | The Antarctic Project | |
| 南极牙鱼 | nán jí yá yú | Antarctic toothfish | |
| 偶极磁体 | ǒu jí cí tǐ | double-pole magnet / dipole magnet | |
| 偶极磁铁 | ǒu jí cí tiě | double-pole magnet / dipole magnet | |
| 群体极化 | qún tǐ jí huà | group | |
| 嗜极生物 | shì jí shēng wù | extremophile | |
| 双极磁心 | shuāng jí cí xīn | double-pole magnet core | |
| 太极图说 | Tài jí Tú shuō | philosophical book by Song dynasty scholar Zhou Dunyi 周敦頤|周敦颐[Zhou1 Dun1 yi2], starting from an interpretation of the Book of Changes | |
| 消极用户 | xiāo jí yòng hù | passive user | |
| 喜极而泣 | xǐ jí ér qì | crying tears of joy (idiom) | |
| 细思极恐 | xì sī jí kǒng | scary to think about (coll.) (coined c. 2013) | |
| 植被极限 | zhí bèi jí xiàn | vegetation limit | |
| 主动积极 | zhǔ dòng jī jí | proactive | |
| 发光二极管 | fā guāng èr jí guǎn | light-emitting diode / LED | |
| 阴极射线管 | yīn jí shè xiàn guǎn | cathode ray tube | |
| 激光二极管 | jī guāng èr jí guǎn | laser diode | |
| 光电二极管 | guāng diàn èr jí guǎn | photodiode | |
| 国际地极年 | | International Polar Year | |
| 南极底层水 | | Antarctic Bottom Water | |
| 隆头南极鱼 | | humped rockcod | |
| 能效极低的 | | extremely energy-inefficient | |
| 地磁极逆转 | | geomagnetic reversal | |
| 南极绕极流 | | Antarctic Circumpolar Current | |
| 南极总目录 | | Antarctic Master Directory | |
| 电极阻抗表 | | electrode impedance meter | |
| 南极保护区 | | Antarctic Protected Area | |
| 南极条约区 | | Antarctic Treaty Area | |
| 多极化世界 | duō jí huà shì jiè | multipolar world | |
| 发光二极体 | fā guāng èr jí tǐ | light-emitting diode (LED) (Tw) | |
| 恒压二极管 | héng yā èr jí guǎn | Zener diode | |
| 核四极共振 | hé sì jí gòng zhèn | nuclear quadrupole resonance | |
| 环极深层水 | huán jí shēn céng shuǐ | Circumpolar Deep Water | |
| 花纹南极鱼 | huā wén nán jí yú | Antarctic rockcod | |
| 南极表层水 | nán jí biǎo céng shuǐ | Antarctic Surface Water | |
| 南极洋论坛 | nán jí yáng lùn tán | Southern Ocean Forum | |
| 南极洲半岛 | Nán jí zhōu Bàn dǎo | the Antarctic Peninsula (jutting out towards South America) | |
| 偏极滤光镜 | piān jí lu:4 guāng jìng | polarizing filter | |
| 齐纳二极管 | Qí nà èr jí guǎn | Zener diode | |
| 四极质谱计 | sì jí zhì pǔ jì | quadrupole mass spectrometer | |
| 稳压二极管 | wěn yā èr jí guǎn | Zener diode | |
| 消极使用者 | xiāo jí shǐ yòng zhě | passive user | |
| 无所不用其极 | wú suǒ bù yòng qí jí | committing all manner of crimes / completely unscrupulous | |
| 冷阴极触发管 | | cold-cathode trigger tube | |
| 半数耐受极限 | | median tolerance limit | |
| 南极钻探项目 | | Antarctic Drilling Project | |
| 社区积极分子 | | community-owned resource person | |
| 南极研究中心 | | Cooperative Research Centre for the Antarctic and Southern Ocean Environment / Cooperative Research Centre for Antarctica and the Southern Ocean | |
| 南极气象中心 | | Antarctic Weather Control | |
| 南极洋避难所 | | Southern Oceans Sanctuary | |
| 椭球极叁角形 | | ellipsoid polar triangle | |
| 危险浓度极限 | | hazard concentration limit | |
| 离子选择电极 | | ion-selective electrodes | |
| 皇太极清太宗 | Huáng tài jí Qīng tài zōng | Hong Taiji (1592-1643), eighth son of Nurhaci 努爾哈赤|努尔哈赤[Nu3 er3 ha1 chi4], reigned 1626-1636 as Second Khan of Later Jin dynasty 後金|后金[Hou4 Jin1], then founded the Qing dynasty 大清[Da4 Qing1] and reigned 1636-1643 as Emperor | |
| 环境浓度极限 | huán jìng nóng duó jí xiàn | environmental limit concentration | |
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