Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
English
heppen
←
Old English
ġehæp
(cognate)
←
English
happy
(mention)
←
Icelandic
heppinn
(mention)
→
English
unheppen
(prefix)