Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
mis
←
Proto-Celtic
*mīns
(inherited)
←
Proto-Indo-European
*meh₁-
(root)
←
Proto-Indo-European
*mḗh₁n̥s
(inherited)
→
Welsh
mislif
(compound)
→
Latvian
mēnesis
(cognate)
→
Latvian
mēness
(cognate)