Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Norse
hryggja
←
Proto-Germanic
*hrewwaną
(inherited)
←
Proto-Germanic
*hriwwijaną
(mention)
→
English
rue
(derived)
→
Icelandic
hryggja
(mention)
→
Old Norse
hryggr
(mention)