This is the 705th most frequent Chinese word.
离开
"To leave" or "to depart."
In this sentence, '离开' (to leave) is used to indicate the action of moving away from a specific location, in this case, home.
他早上九点离开了家。
He left home at nine in the morning.
In this example, '离开' (to leave) refers to the concept of formally departing from an organization or place, such as a workplace in this instance.
如果你离开公司，请记得归还钥匙。
If you leave the company, please remember to return the keys.
Here, '离开' is metaphorically used to mean 'stray or deviate from,' applied to the context of a conversation or topic.