Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Indo-Aryan
*swap-
→
Hindi
सोना
(root)
→
Hindi
स्वप्न
(root)
→
Hindi
सपना
(root)
→
Maithili
सपना
(root)
→
Nepali
सपना
(root)
→
Urdu
سپنا
(root)