Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Icelandic
eða
←
Old English
oþþe
(mention)
←
Proto-Germanic
*efþau
(inherited)
←
Old High German
odar
(mention)
←
Old Norse
eða
(inherited)
→
Icelandic
það er ýmist of eða van
(mention)