Where does “குரு” come from?

குரு (Tamil) comes from Sanskrit गुरु, from Proto-Indo-Aryan gr̥Húṣ, from Proto-Indo-Iranian gr̥Húš, from Proto-Indo-European gʷréh₂us, from Proto-Indo-European -us — Forms adjectives from Caland system roots.

குரு (Tamil): spiritual preceptor, guru, teacher, family priest, father, king

Definitions

spiritual preceptor, guru, teacher, family priest, father, king

Ancestry of “குரு”, step by step

Step	Language	Word	Meaning
1	Sanskrit	गुरु	heavy; weighty
2	Proto-Indo-Aryan	gr̥Húṣ	—
3	Proto-Indo-Iranian	gr̥Húš	heavy
4	Proto-Indo-European	gʷréh₂us	heavy
5	Proto-Indo-European	-us	Forms adjectives from Caland system roots

Words derived from “குரு”

குருகுலம்
குருத்து
குருத்தோலை
குருத்தெலும்பு
குருத்தோலைஞாயிறு

Every word from Proto-Indo-European -us →Every word from Proto-Indo-European gʷréh₂us →Every word from Proto-Indo-Iranian gr̥Húš →