Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
English
dowf
←
Old English
dēaf
(cognate)
←
English
dof
(doublet)
←
English
dove
(link)
←
English
deaf
(link)
←
Middle English
(inherited)
←
Proto-Germanic
*daubaz
(derived)
←
Proto-Indo-European
*dʰūbʰ-
(derived)
←
Proto-Indo-European
*dʰūp-
(mention)
←
Icelandic
daufur
(cognate)
←
Old Norse
daufr
(derived)
→
English
daff
(doublet)
→
English
dof
(doublet)
→
English
dowfness
(suffix)
→
Dutch
dof
(cognate)