Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old English
þrēatian
→
English
threat
(inherited)
→
English
threaten
(inherited)
→
Old English
þreotan
(cognate)
→
Old English
aþreotan
(cognate)