Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Norse
spegill
←
Middle Low German
spegel
(borrowed)
←
Proto-Indo-European
*speḱ-
(root)
←
Proto-Indo-European
*speḱ-
(derived)
←
Latin
speculum
(derived)
→
Westrobothnian
spägjel
(inherited)
→
Norwegian Bokmål
speil
(derived)
→
Norwegian Nynorsk
spegel
(derived)
→
Swedish
spegel
(derived)