θόλος

Etymology
. According to Beekes, the comparison with 🇨🇬 and 🇨🇬 should be discarded. The connection with makes more sense and would lead to a  origin. A few scholars, such as Guus Kroonen, still maintain the Indo-European etymology and reconstruct.

Noun

 * 1)  A round building with conical roof, a rotunda
 * 2) A vaulted steam bath
 * 3) A bandage for the head invented by Diocles

Etymology
From, thence uncertain, but, according to Beekes, possibly cognate with.

Noun

 * 1)  dome, vault
 * 2)  vault, sky
 * 3)  body cavity