Where does “ἀρχιπέλαγος” come from?

ἀρχιπέλαγος (Byzantine Greek) comes from Ancient Greek ἀρχι-, from Ancient Greek ἄρχω, from Proto-Indo-European h₂ergʰ- — to begin; to command, rule; to begin, rule,...

Ancestry of “ἀρχιπέλαγος”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	ἀρχι-	denotes primary importance or authority
2	Ancient Greek	ἄρχω	To begin; To lead, rule, govern, command; To be...
3	Proto-Indo-European	h₂ergʰ-	to begin; to command, rule; to begin, rule,...

Every word from Proto-Indo-European h₂ergʰ- →Every word from Ancient Greek ἄρχω →Every word from Ancient Greek ἀρχι- →