Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Icelandic
sljór
←
Proto-Germanic
*slaiwaz
(inherited)
←
Old Norse
sljór
(inherited)
←
Old Norse
sljár
(mention)
←
Old Norse
slær
(mention)
→
English
slow
(cognate)