Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
West Frisian
achttjin
→
English
eighteen
(cognate)
→
German
achtzehn
(cognate)
→
Dutch
achttien
(cognate)
→
Vilamovian
aochcao
(cognate)