Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Icelandic
sjaldan
←
Old Norse
sjaldan
(derived)
→
English
seldom
(cognate)
→
German
selten
(cognate)
→
Icelandic
örsjaldan
(affix)