monarchial

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mon·ar·chy

M0381200 (mŏn′ər-kē, -är′-)n. pl. mon·ar·chies 1. Government by a monarch.2. A state ruled or headed by a monarch.
[Middle English monarchie, from Old French, from Latin monarchia, from Greek monarkhiā, from monarkhos, monarch; see monarch.]
mo·nar′chi·al (mə-när′kē-əl) adj.