Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Portuguese
régua
←
Proto-Indo-European
*h₃reǵ-
(mention)
←
Latin
rēgula
(borrowed)
←
Latin
regō
(mention)
←
Portuguese
regra
(mention)
←
Portuguese
relha
(doublet)
→
Portuguese
regra
(mention)