Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
tét
←
Proto-Celtic
*tantā
(inherited)
←
Welsh
tant
(cognate)
←
Proto-Indo-European
*ten-
(root)
←
Proto-Indo-European
*ten-
(derived)
←
Old Irish
tétach
(link)
←
Old Irish
tétaire
(link)
←
Old Irish
tétán
(link)
→
Irish
téad
(inherited)
→
Manx
tead
(inherited)
→
Icelandic
þenja
(cognate)