Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
lachu
←
Lithuanian
lak
(cognate)
→
Irish
lacha
(inherited)
→
Scottish Gaelic
lach
(inherited)
→
Manx
laagh
(inherited)