Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Portuguese
servo
←
Proto-Indo-European
*ser-wo-
(derived)
←
Latin
servus
(inherited)
←
Portuguese
servir
(link)
←
Portuguese
serviço
(link)
←
Portuguese
serviçal
(link)
←
Portuguese
servente
(link)
←
Portuguese
criado
(link)
←
Portuguese
escravo
(link)
→
Sicilian
serbu
(cognate)