Where does “Avah” come from?

Avah (English) comes from English ava, from Burmese အင်းဝ, from Burmese ဝ, from Pali vassa, from Sanskrit वर्ष, from Proto-Indo-European h₁wers-ó-m, from Proto-Indo-European h₁wers- — to rain.

Ancestry of “Avah”, step by step

Step	Language	Word	Meaning
1	English	ava	Alternative form of kava
2	Burmese	အင်းဝ	—
3	Burmese	ဝ	Wa, the 30th letter of the Burmese alphabet
4	Pali	vassa	rain; year
5	Sanskrit	वर्ष	rain, raining, a shower; the rains, rainy season;...
6	Proto-Indo-European	h₁wers-ó-m	—
7	Proto-Indo-European	h₁wers-	to rain

Every word from Proto-Indo-European h₁wers- →Every word from Proto-Indo-European h₁wers-ó-m →Every word from Sanskrit वर्ष →