(每日一词）refinery

Refinery  /rɪˈfaɪ.nɚ.i/ n.  精制厂；提炼厂；精炼厂

meaning:  a factory where substances in their natural state, such as oil or sugar, are made pure. 

前缀：re-再一次（repeat) 

词根：fin- 理解为fine 好

后缀：-ery 名词后缀，比如nursery 托儿所；robbery 抢劫