to close in Chinese:

1. 关

Chinese word "to close"(关) occurs in sets:

最常用1000英语单词 351-400
基础动词 - Basic verbs

2. 关闭

Chinese word "to close"(关闭) occurs in sets:

Basic Verbs 3 基本动词 3 Jīběn dòngcí 3
电脑，网络和技术 - Computers，internet and new technologies