Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
aimitis
←
Old French
ametiste
(derived)
←
Ancient Greek
ἀμέθυστος
(derived)
←
Latin
amethystus
(derived)
←
Middle Irish
ametis
(inherited)