Where does “pamāṇa” come from?

pamāṇa (Pali) comes from Sanskrit प्रमाण, from Proto-Indo-Iranian pramaHnam, from Proto-Indo-European *meh₁nom, from Proto-Indo-European meh₁- — to measure.

pamāṇa (Pali): measure, size, amount

Definitions

measure, size, amount

Ancestry of “pamāṇa”, step by step

Step	Language	Word	Meaning
1	Sanskrit	प्रमाण	proof, authority; any proof, testimony, or...
2	Proto-Indo-Iranian	pramaHnam	—
3	Proto-Indo-European	*meh₁nom	—
4	Proto-Indo-European	meh₁-	to measure

Every word from Proto-Indo-European meh₁- →Every word from Proto-Indo-European *meh₁nom →Every word from Proto-Indo-Iranian pramaHnam →