Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
West Frisian
iik
←
Proto-Indo-European
*h₂eyǵ-
(root)
←
Old Frisian
ēk
(inherited)
→
English
oak
(cognate)
→
German
Eiche
(cognate)
→
North Frisian
iik
(cognate)
→
Luxembourgish
Eech
(cognate)