汽车 (qìchē) means 'car' or 'automobile.' It is the standard word for motor vehicles in Chinese, combining 汽 (steam/gas) and 车 (vehicle). It is used in both everyday conversation and formal contexts when referring to cars or automobiles.
我打算明年买一辆新汽车。
Wǒ dǎsuàn míngnián mǎi yī liàng xīn qìchē.
I plan to buy a new car next year.
这条路上汽车太多了,总是堵车。
Zhè tiáo lù shàng qìchē tài duō le, zǒngshì dǔchē.
There are too many cars on this road; there are always traffic jams.
电动汽车越来越受欢迎了。
Diàndòng qìchē yuè lái yuè shòu huānyíng le.
Electric cars are becoming more and more popular.