Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Norse
tað
→
English
tass
(cognate)
→
English
tath
(derived)
→
Finnish
tade
(cognate)
→
Icelandic
tað
(inherited)