I. |ärch, |ȧch, but |ärk or |ȧk in “archangel” and derivatives prefix
Etymology: Middle English arche-, arch-, from Old English & Old French; Old English arce-, erce-, from Late Latin arch- & Latin archi-, from Greek arch-, archi- ; Old French arch-, arche-, from Late Latin arch- & Latin archi- — more at archi-
1. : chief : principal
arch angel
arch bishop
arch diocese
arch duke
arch pillar
2. : preeminent : extreme : most fully embodying the qualities of his or its kind
arch antiquary
arch capitalist
arch fool
arch infamy
arch philosopher
arch puritan
arch rogue
3. : first in time
arch father
: primitive
arch form
II.
— see archi-