Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Indo-European
*-r
→
English
there
(mention)
→
English
thereabout
(mention)
→
Lithuanian
yra
(mention)
→
Latvian
ir
(mention)