Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
dú
←
Proto-Celtic
*gdū
(inherited)
←
Proto-Indo-European
*dʰéǵʰōm
(inherited)
→
Scottish Gaelic
dùth
(inherited)
→
Hittite
𒋼𒂊𒃷
(cognate)
→
Old Irish
duine
(mention)