开 = kāi = to open, to drive
开 has 2 main meanings: to drive and to open or start things.
开车 (kāi chē) means to drive, while 开车人 (kāi chē rén) is the driver.
The majority of words with 开 are related to openness though: 开市 (kāi shì) is to open a store for business, and 开裆裤 (kāi dāng kù) are the open pants that toddlers use. My favourite word with it is 开心 (kāi xīn) which means to be happy, or with a open heart.












