Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Latgalian
eiss
←
Proto-Indo-European
*eis-
(inherited)
←
Lithuanian
įsas
(cognate)
←
Latvian
īss
(cognate)
→
Latgalian
eiši
(suffix)