Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Scottish Gaelic
gob
←
Proto-Celtic
*gobbos
(inherited)
←
Proto-Indo-European
*ǵebʰ-
(inherited)
←
Old Irish
gop
(inherited)
→
English
gob
(derived)
→
French
gober
(cognate)
→
Scottish Gaelic
gobach
(affix)