Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Germanic
*þakwōną
→
English
thack
(inherited)
→
English
thwack
(inherited)
→
Old English
þaccian
(inherited)
→
Icelandic
þjaka
(inherited)