(每日一词) Janitor

Janitor /ˈdʒænɪtər/ n. 门卫、清洁工或杂工

meaning: a person employed to take care of a large building, such as a school, and who deals with the cleaning, repairs, etc.

词根: jan- 门(January 一月, Janus 罗马神话里守门的双面神) 

后缀: -itor 名词后缀, 多表人

e.g. He worked as a janitor for many years. 他做了很多年的门卫。