(每日一词）reticent

Reticent /ˈret̬.ə.sənt/ adj.  沉默寡言的；不愿交谈的

meaning: unwilling to speak about your thoughts or feelings 

1) 词根：retic-安静（助记return + ic) 

2) 后缀：-ent 形容词后缀（different) 

e.g. He is very reticent about his past. 他不愿谈及他的过去。