ἄρχος
arkhós
“leader, commander”
5 words in English grow from this root.
Anarchy
Philosophyἀν-an-
“without a ruler”
Heresiarch
Faithαἵρεσιςhaíresis
“chief of a sect”
Navarch
Politicsναῦςnaûs
“ship commander”
Polemarch
Politicsπόλεμοςpólemos
“war leader”
Trierarch
Politicsτριήρηςtriḗrēs
“trireme commander”