Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Scottish Gaelic
tana
←
Proto-Celtic
*tanawyos
(inherited)
←
Proto-Indo-European
*ténh₂us
(inherited)
←
Old Irish
tanae
(inherited)
→
Manx
thanney
(cognate)