Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
teallach
←
Irish
tine
(mention)
←
Proto-Indo-European
*tep-
(root)
←
Middle Irish
tellach
(inherited)
←
Old Irish
tenlach
(inherited)