Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
penty
←
Welsh
pen
(compound)
←
Welsh
tŷ
(compound)
←
Welsh
pentis
(mention)
←
English
penthouse
(derived)