Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Saterland Frisian
säks
←
German
sechs
(cognate)
←
West Frisian
seis
(cognate)
←
Proto-West Germanic
*sehs
(inherited)
←
Old Frisian
sex
(inherited)