Also interesting.

The etymology of the word god.
[link to www.etymonline.com (secure)]

...perhaps from PIE(proto indo european) *ghut- "that which is invoked" (source also of Old Church Slavonic zovo "to call," Sanskrit huta- "invoked," an epithet of Indra), from root *gheu(e)- "to call, invoke." The notion could be "divine entity summoned to a sacrifice."