(每日一词）emissary

emissary  /ˈem.ɪ.ser.i/ n. 使者；特使；密使

meaning: a person sent by one government or political leader to another to take messages or to take part in discussions. 

1) 前缀：e-表示ex-向外（exit 出口）

2) 词根：miss-发射 （miss 想念，联想外发射小心心）

3) 后缀：-ary 可作为名词后缀（dictionary 字典）

e.g. He flew to China as the personal emissary of the President. 他以总统的私人特使身份乘飞机前往中国。