demote
verb
[ diːˈməʊt ]
• move (someone) to a lower position or rank, usually as a punishment.
• "the head of the army was demoted to deputy defence secretary"
Similar:
downgrade,
relegate,
declass,
move down,
lower in rank,
reduce in rank,
strip of rank,
reduce to the ranks,
depose,
unseat,
dethrone,
displace,
oust,
drum out,
remove from office,
cashier,
disrate,
bust,
Origin:
late 19th century: from de- ‘down’ + a shortened form of promote.