名詞 monarch:

1. a nation's ruler or head of state usually by hereditary right
   同義詞：sovereign, crowned head
2. large migratory American butterfly having deep orange wings with black and white markings; the larvae feed on milkweed
   同義詞：monarch butterfly, milkweed butterfly, Danaus plexippus

1. A monarch has the prerogative of pardoning criminals.
   君主享有對罪犯的赦免權(quán)。
2. A monarch has the prerogative of mercy for criminals.
   君主享有對罪犯的赦免權(quán)。
3. The monarch as head of state.
   國王作為國家元首的君主
4. They attempted to overthrow the monarch.
   他們企圖推翻國王。

mon.arch

n.（名詞）
One who reigns over a state or territory, usually for life and by hereditary right, especially:
君主：統(tǒng)治一個(gè)國家或地區(qū)的人，通常指世襲和終身統(tǒng)治，尤指
A sole and absolute ruler.
唯一和絕對的統(tǒng)治者
A sovereign, such as a king or an empress, often with constitutionally limited authority:
君主，如國王或女皇，通常權(quán)力受憲法的制約：
例句：
a constitutional monarch.
立憲制君主

One that commands or rules:
統(tǒng)治者或指揮者：
例句：
.I am monarch of all I survey.(William Cowper)
.我是我所見到的一切的君主.(威廉·柯珀)

One that surpasses others in power or preeminence:
大王：在力量或杰出程度上超越其他的事物：
例句：
.Mont Blanc is the monarch of the mountains.(Byron)
.布蘭克山是山中之王.(拜倫)

A monarch butterfly.
黑脈金斑蝶

來源：
Middle English monarke
中古英語 monarke
from Old French monarque
源自 古法語 monarque
from Late Latin monarcha
源自 后期拉丁語 monarcha
from Greek monarkhos
源自 希臘語 monarkhos
mono- [mono-]
mono- [前綴，表.單一.]
arkhein [to rule]
arkhein [統(tǒng)治]

【引伸】
monar.chal
monar.chally 或
monar.chically
adv.（副詞）