Meaning of -ARCH in English
a combining form meaning "chief, leader, ruler," used in the formation of compound words: monarch; matriarch; heresiarch.
[ -archos or -arches, as comb. forms of árchos leader; cf. ARCHI- ]
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012