Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Indo-Iranian
*dʰawgʰ-
→
Hindi
दूध
(root)
→
Marathi
दूध
(root)
→
Nepali
दूध
(root)