According to Etymonline,
Indo-Iranian asuras, from suffixed form of PIE root ansu- "spirit"
Proto-Indo-European. Source also of,
collective name for the chief gods of the pagan Scandinavian religion, from Old Norse plural of ass "god," from Proto-Germanic ansu- (source also of Old High German ansi, Old English os, Gothic ans "god"), from PIE root ansu- "spirit"
Perhaps related to (but unproven),
wooden pillar used as symbol of Canaanite goddess Ashera, 1839, a name of unknown origin.
Ashera/Asherah is called
Ašratu(m) in Akkadian and
Asertu(s) in Hittite. Akkadians were later called Assyrians. She was consort of El in ancient Canaan and perhaps also consort to YHVH to early Hebrews.1
On a related note, Etymonline says,
"god, good spirit" in Hindu religion, from Sanskrit deva "a god," originally "a shining one," from div- "to shine," thus cognate with Greek dios "divine" and Zeus, and Latin deus "god" (Old Latin deivos), from PIE root dyeu- "to shine," in derivatives "sky, heaven, god."
This PIE root relates also to,
diva "by day;" Avestan dava- "spirit, demon;" Greek delos "clear;" Latin dies "day," deus "god;" Welsh diw, Breton deiz "day;" Armenian tiw "day;" Lithuanian dievas "god," diena "day;" Old Church Slavonic dini, Polish dzień, Russian den "day;" Old Norse tivar "gods;" Old English Tig, genitive Tiwes, name of a god.
as well as,
PIE dewos- "god" (source also of … Old Persian daiva- "demon, evil god," Old Church Slavonic deivai…)
and further to the English words
Jupiter … from Latin Iupeter, Iupiter, Iuppiter, "Jove, god of the sky and chief of the gods," [from Old Latin Iovis,] from PIE dyeu-peter- "god-father"`.
1. Wesler, Kit W. (2012). An Archaeology of Religion. University Press of America. p. 193.
2. All else, Etymonline.com