Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Saterland Frisian
Riekdum
←
German
Reichtum
(cognate)
←
English
richdom
(cognate)
←
Proto-Germanic
*rīkijadōmaz
(inherited)
←
Old Frisian
rīkedōm
(inherited)
←
Saterland Frisian
riek
(suffix)
←
Saterland Frisian
dum
(suffix)