Where does “দ্বীপপুঞ্জ” come from?

দ্বীপপুঞ্জ (Bengali) comes from Bengali দ্বীপ, from Sanskrit द्वीप, from Proto-Indo-Iranian dwiHpás, from Proto-Indo-Iranian Hā́ps, from Proto-Indo-European h₂ep- — water, body of water.

দ্বীপপুঞ্জ (Bengali): archipelago

Definitions

archipelago

Ancestry of “দ্বীপপুঞ্জ”, step by step

দ্বীপপুঞ্জ traces back through two separate lines of ancestry.

via Bengali দ্বীপ

Step	Language	Word	Meaning
1	Bengali	দ্বীপ	island
2	Sanskrit	द्वीप	island, peninsula, sandbank; division of the...
3	Proto-Indo-Iranian	dwiHpás	island
4	Proto-Indo-Iranian	Hā́ps	water
5	Proto-Indo-European	h₂ep-	water, body of water

via Bengali পুঞ্জ

Step	Language	Word	Meaning
1	Bengali	পুঞ্জ	group; accumulation; collection
2	Sanskrit	पुञ्ज	quantity, heap

Every word from Proto-Indo-European h₂ep- →Every word from Proto-Indo-Iranian Hā́ps →Every word from Proto-Indo-Iranian dwiHpás →