half-timer
构词拆分
half-time词根/词干
+
-er后缀
(added to verbs) A person or thing that does an action indicated by the root verb; used to form an agent noun. · (added to verbs, informal) A person or thing to which the root verb is done or can be done satisfactorily.
词源说明
释义（英文）
名词 Noun
- One who works only half the usual time.
- (historical) A pupil in an elementary school allowed to be absent half the school-day at some employment.