demote
/diːˈməʊt/verb
with obj.(常作be demoted)
- give (someone) a lower rank or less senior position, usually as a punishment使（某人）降级, 把（某人）降职, 贬黜：
the head of the army was demoted to deputy defence secretary
陆军司令被降职为副国防部长。
词源
late 19th cent.: from DE- 'down' + a shortened form of PROMOTE.