| 1 | Hindi | गुरु | heavy; guru, teacher, sage; Jupiter |
| 2 | Urdu | گرو | guru; sage; teacher |
| 3 | Punjabi | ਗੁਰੂ | enlightener; guru, sage, teacher |
| 4 | Sanskrit | गुरु | heavy, weighty; heavy in the stomach , difficult... |
| 5 | Proto-Indo-Aryan | gr̥Húṣ | — |
| 6 | Proto-Indo-Iranian | gr̥Húš | heavy |
| 7 | Proto-Indo-European | gʷréh₂us | heavy |
| 8 | Proto-Indo-European | -us | Forms adjectives from Caland system roots |