Meaning of kāi:
开
to open (transitive or intransitive); (of ships, vehicles, troops etc) to start; to turn on; to put in operation; to operate; to run; to boil; to write out (a prescription, check, invoice etc)
Qǐng bāng wǒ dǎkāi zhè shàn mén.
请帮我打开这扇门。
Please help me open this door.
Huǒchē zhǔnshí kāi zǒule.
火车准时开走了。
The train left on time.
Wǒ měitiān zǎoshang dōu yào kāi dēng.
我每天早上都要开灯。
I turn on the light every morning.
Shuǐ yǐjīng kāi le, wǒmen kěyǐ kāishǐ zhǔ miàntiáo le.
水已经开了，我们可以开始煮面条了。
The water has already boiled, we can start cooking the noodles.
Yīshēng gěi wǒ kāi le yī zhāng chùfāng.
医生给我开了一张处方。
The doctor wrote me a prescription.
(directional complement) away; off
Tā bǎ mén kāi le.
他把门开了。
He opened the door.
carat (gold); abbr. for Kelvin, 開爾文|开尔文[Kai1er3wen2]; abbr. for 開本|开本[kai1ben3], book format
Zhè méi jièzhǐ shì shíbā kāi jīn zhìchéng de.
这枚戒指是十八开金制成的。
This ring is made of 18 karat gold.
Míngtiān de kēxué kè jiāng tǎolùn wēndù de dānwèi, bāokuò Kāi'ěr wén.
明天的科学课将讨论温度的单位，包括开尔文。
Tomorrow's science class will discuss units of temperature, including Kelvin.
Qǐng bāng wǒ kāi mén.
请帮我开门。
Please help me open the door.
