君主英文：monarch; sovereign; king; liege; duke.
英汉大词典：
an absolute monarch 专制君主。?
an uncrowned monarch 无冕君主。?
discard the monarchy 废弃君主政体。?
deposed monarch 被废黜的君主。?
abdicated monarch 退位君主。?
The monarch was ousted by a military coup. 那君主被军事政变者废黜了。
Morocco is a sovereign independent monartery. 摩洛哥是个有主权的独立君主国。?
双语例句：
1、He had the ear of the monarch.
他在君主那里说得上话。?
2、Those right-wing people who most honour their monarch see no reason for any apology.
那些对君主最为尊崇的右翼人士认为没有理由作出道歉。?
3、The power of the monarchy was circumscribed by the new law.
君主统治的权力受到了新法律的制约。