治安

1. 主要地；基本上
You use basically for emphasis when you are stating an opinion, or when you are making an important statement about something.

2. 大致说来；从根本上来讲
You use basically to show that you are describing a situation in a simple, general way, and that you are not concerned with less important details.

1. in essence
at bottom or by one's (or its) very nature

e.g. He is basically dishonest
the argument was essentially a technical one
for all his bluster he is in essence a shy person

Synonym: fundamentallyessentially