Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Middle Irish
[[técs]], [[técsa]]
→
Irish
téacs
(inherited)
→
Scottish Gaelic
teacsa
(inherited)
→
Manx
teks
(inherited)