monarch
Rule/govern
Nemesis is a word for arch rival.
To throw in a high arch: lob
Pertaining to a mother is the English equivalent of 'matri-'. It comes from the Latin noun 'mater', which means 'mother'. Chief, Principal is the English equivalent of 'arch-'. It comes from the Greek infinitive 'archein', which means 'to begin, to rule'.
rule = regulation
nemesis
A word that ends with 'ible' and means that can be eaten is edible.
A chief is also sometimes referred to as a(n) arch.
adversary
The Greek word for "rule" literally means "to umpire".
The word arch can either be a noun or a verb. As a noun, it means a curved symmetrical structure. As a verb, it means to bend backwards or to provide with a curve.
The word that ends in "ant" and means sleeping is "recreant." It refers to someone who is cowardly or unfaithful.