Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Danish
gavn
←
Danish
gen-
(cognate)
←
Danish
igen
(mention)
←
Danish
gennem
(mention)
←
Danish
gavne
(link)
←
English
gain
(mention)
←
Proto-Germanic
*gagną
(derived)
←
Proto-Germanic
*gagin
(derived)
←
Old Norse
gagn
(derived)
→
English
gain
(cognate)
→
Danish
gavnlig
(suffix)
→
Danish
gavne
(cognate)