Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
mellt
←
Proto-Indo-European
*meldʰ-
(inherited)
←
Old Norse
Mjǫllnir
(cognate)
→
English
Mjollnir
(cognate)
→
Welsh
mellten
(affix)
→
Old Norse
Mjǫllnir
(cognate)
→
Russian
молния
(cognate)