Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Frisian
to
→
West Frisian
ta
(inherited)
→
Old Frisian
tohakia
(prefix)
→
Saterland Frisian
tou
(inherited)