Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Portuguese
senha
←
Spanish
seña
(cognate)
←
Latin
signa
(inherited)
←
Portuguese
signum
(mention)
←
Portuguese
sino
(doublet)
←
Old Portuguese
senna
(inherited)