Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Scottish Gaelic
tre
←
Proto-Celtic
*trē
(inherited)
←
Welsh
trwy
(cognate)
←
Proto-Indo-European
*terh₂-
(derived)
←
Old Irish
tre
(inherited)