Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
English
frother
←
Old English
frōfor
(inherited)
←
English
frover
(link)
←
English
froth
(suffix)
←
English
er
(suffix)
←
Middle English
frovre
(cognate)
←
Middle English
frofre
(mention)
←
Proto-West Germanic
*frōbru
(inherited)
←
Old High German
fluobara
(cognate)
←
Proto-Indo-European
*trep-
(derived)
←
Proto-Indo-European
*terp-
(mention)
←
Old Saxon
frōvra
(cognate)
←
Old Saxon
frōfra
(mention)