7A7A không không Korean: 15 NHSK word(s): 空调* 3 kong1 tiao2air conditioning 填空* 4 tian2 kong4to fill a job vacancy/ to fill in a blank (e.g. on questionnaire or exam paper) 空气* 4 kong1 qi4air/ atmosphere 空间* 5 kong1 jian1space/ CL:個|个[ge4] 空闲* 5 kong4 xian2idle/ free time/ leisure 天空* 5 tian1 kong1sky 抽空* 6 chou1 kong4to find the time to do sth 空洞* 6 kong1 dong4cavity/ empty/ vacuous 空前绝后* 6 kong1 qian2 jue2 hou4unprecedented and never to be duplicated/ the first and the last/ unmatched/ unique 空想* 6 kong1 xiang3daydream/ fantasy/ to fantasize 空虚* 6 kong1 xu1hollow/ emptiness/ meaningless 空白* 6 kong4 bai2blank space 空隙* 6 kong4 xi4crack/ gap between two objects/ gap in time between two events 太空* 6 tai4 kong1outer space 航空* 6 hang2 kong1aviation KOREAN6000 word(s): KOREAN 2500 New HSK words): KOREAN Sentence(s):