Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
English
crass
←
English
grease
(doublet)
←
Middle English
cras
(inherited)
←
Middle English
craas
(mention)
←
Old French
cras
(derived)
←
Latin
crassus
(derived)
→
English
grease
(doublet)
→
English
crassness
(suffix)
→
English
crassly
(suffix)
→
German
krass
(cognate)
→
Dutch
kras
(cognate)