Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Galician
touca
←
Spanish
toca
(cognate)
←
Basque
taika
(cognate)
←
Proto-Indo-European
*tewh₂-
(derived)
←
Latin
tauca
(mention)
←
Portuguese
touca
(cognate)
→
Galician
touquinegra
(compound)