Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Swedish
gen-
←
Danish
gen-
(cognate)
←
German
gegen
(cognate)
←
English
again
(cognate)
←
Proto-Germanic
*gagin
(derived)
←
Old Swedish
gen
(derived)
←
Norwegian Bokmål
gjen-
(cognate)
←
Old Norse
gegn
(mention)
←
Swedish
igen
(mention)
→
Swedish
genmäle
(affix)
→
Swedish
gendriva
(affix)
→
Swedish
gengångare
(affix)
→
Swedish
gengäld
(affix)
→
Swedish
genljuda
(affix)
→
Swedish
gensaga
(affix)
→
Swedish
genkäromål
(affix)
→
Swedish
genmäla
(affix)