Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Latin
placidus
←
Latin
placeō
(suffix)
←
Latin
idus
(suffix)
←
Latin
plācātus
(mention)
→
English
placid
(mention)
→
Catalan
plàcid
(derived)
→
Spanish
plácido
(derived)
→
Italian
placido
(derived)
→
Latin
placatus
(mention)
→
Latin
Placidus
(mention)
→
Portuguese
plácido
(derived)