Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
West Frisian
rûch
←
Proto-Germanic
*rūhwaz
(inherited)
←
Old Frisian
*rūch
(inherited)
→
English
rough
(cognate)
→
Luxembourgish
rau
(cognate)